when ready Pot cookware is generally considered safe for everyday cooking, but the answer depends on which part of the device you're asking about and how you use it.
The inner cooking pot in most when ready Pot models is made of stainless steel, which does not leach chemicals into food under normal cooking conditions. The lid, sealing ring, and other components are made from materials like silicone, plastic, and metal that are food-grade and designed to withstand heat and pressure. However, some parts — particularly the silicone sealing ring — can absorb odors and flavors over time, and certain plastics may degrade if exposed to extreme heat or prolonged contact with acidic foods.
The real concern for most users is not whether the when ready Pot itself is toxic, but whether you're using it correctly and maintaining it properly. A damaged sealing ring, a cracked inner pot, or food left sitting in the device for days can create conditions where bacteria grow or flavors transfer. Understanding what each material is and how to care for it will tell you whether your when ready Pot is safe for your household.
Key Takeaways
- The stainless steel inner pot does not leach harmful chemicals during normal cooking and is the safest part of the device.
- Silicone sealing rings are food-grade but can absorb odors and flavors, and should be replaced every 12 to 24 months depending on use.
- Plastic components on the lid and exterior are designed to withstand the heat inside the device but can degrade if exposed to direct flame or extreme temperatures.
- The biggest safety risk comes from improper maintenance — leaving food in the pot, not cleaning the sealing ring, or using a damaged pot — rather than from the materials themselves.
What the Inner Pot Is Made Of and Why It Matters
The cooking vessel itself — the part that holds your food — is made of stainless steel, typically 18/8 or 18/10 grade (meaning 18 percent chromium and 8 or 10 percent nickel). This material is non-reactive, meaning it does not leach iron, nickel, or other metals into acidic foods like tomato sauce or vinegar-based dishes. Stainless steel is used in commercial kitchens and food service for this reason.
The inner pot can develop small scratches and discoloration over time, which is normal and does not affect safety. However, if the pot develops a dent deep enough to crack the surface, or if the bottom becomes warped, you should replace it. A warped bottom prevents proper heat distribution and can cause the device to malfunction. Cracks expose the underlying metal and can allow food particles to lodge in the damage, creating a place for bacteria to grow.
You can check whether your inner pot is still safe by filling it with water, placing it on a flat surface, and spinning it gently. If it rocks or wobbles, the bottom is warped and the pot should be replaced. when ready Pot sells replacement inner pots, and they are also available from third-party manufacturers.
The Silicone Sealing Ring and Why It Needs Replacing
The sealing ring — the rubber-like band that sits inside the lid — is made of food-grade silicone. Silicone is heat-stable and does not break down or leach chemicals at the temperatures inside an when ready Pot. However, silicone is porous, meaning it absorbs odors and flavors from the foods you cook. If you cook fish, garlic, or curry, the ring will retain those smells even after washing.
Over time, the silicone also loses elasticity. A ring that no longer seals tightly will cause the device to lose pressure or fail to build pressure at all. Most manufacturers recommend replacing the sealing ring every 12 to 24 months, depending on how often you use the device. If you notice that your when ready Pot is not reaching pressure, or if the ring has visible cracks, discoloration, or a strong smell that does not wash out, replace it.
You can buy replacement rings in different colors and from different manufacturers. Some aftermarket rings are cheaper than official when ready Pot rings, but they vary in quality. If you buy a third-party ring, check the reviews to see whether other users report it lasting as long as the original.
Plastic Components and Heat Exposure
The lid, the outer housing, and the control panel contain plastic and silicone components. These are food-grade materials rated for the temperatures they will encounter during normal use. The plastic on the lid is designed to withstand steam and heat from below, but it is not designed to be placed directly over a flame or in an oven.
If you remove the lid and place it face-down on a hot stovetop, or if you expose it to direct heat from a broiler or grill, the plastic can warp or melt. Similarly, if you wash the lid in a dishwasher on the hottest setting, the plastic may degrade over time. Hand-washing the lid in warm water is safer and will extend its life.
The control panel and buttons are also plastic and should not be submerged in water. If liquid gets inside the device through the control panel, it can damage the electronics. Wipe the exterior with a damp cloth, but do not pour water over the top of the device.
What Happens When You Cook Acidic Foods
One concern people raise is whether acidic foods — tomato sauce, vinegar, lemon juice, wine — can cause the stainless steel to leach metals. In general, stainless steel is resistant to corrosion from acidic foods, and the amount of time food spends in the pot during cooking is too short for significant leaching to occur. However, if you leave acidic food sitting in the pot for hours or days after cooking, the risk increases slightly.
To be safe, transfer food to a glass or ceramic container as soon as cooking is done. Do not store leftovers in the inner pot, even in the refrigerator. This practice also prevents the pot from absorbing flavors and odors, and it makes cleaning easier.
If you cook very acidic foods regularly — such as chili with vinegar or tomato-based soups — inspect the inner pot every few months for signs of pitting or corrosion. Pitting looks like small holes or rough spots on the surface. If you see it, the pot should be replaced.
Maintenance Steps That Keep Your when ready Pot Safe
The most important safety measure is regular cleaning. After each use, remove the sealing ring and wash it separately in warm soapy water. Wipe out the inner pot and the underside of the lid. Food particles left in the device can harbor bacteria, especially if the pot sits at room temperature for more than a few hours.
Once a month, soak the sealing ring in warm water with a little baking soda to remove absorbed odors. If the ring smells like old food even after soaking, it is time to replace it. Check the float valve (a small pin on the lid that rises when pressure builds) to make sure it moves freely and is not blocked by food particles.
Inspect the rim of the inner pot where the sealing ring sits. If you see cracks, dents, or buildup that does not wash away, clean it with a soft brush or cloth. A dirty rim prevents the ring from sealing properly, which can cause the device to malfunction or fail to build pressure.
Third-Party Accessories and Their Safety
Many people buy accessories for their when ready Pot — steamer baskets, egg racks, glass lids, and silicone molds. These vary widely in quality and material. Before buying a third-party accessory, check whether it is made of food-grade stainless steel or silicone, and whether it has reviews from other users who have used it successfully.
Avoid accessories made of thin plastic or unknown materials. Some cheap silicone molds or plastic inserts may not be food-grade and could leach chemicals when heated. If an accessory smells strongly of plastic or rubber when you open the package, soak it in hot water for an hour before using it to help off-gas any volatile compounds.
Glass lids sold as when ready Pot replacements are generally safe, but they are not designed to withstand pressure like the original lid. Use a glass lid only when the device is not pressurized — for example, when sautéing or slow-cooking with the lid off.
Frequently Asked Questions
Can I cook in an when ready Pot if the sealing ring smells bad?
Yes, the smell does not mean the ring is unsafe — it just means the silicone has absorbed odors from previous meals. Soak the ring in warm water with baking soda for 30 minutes, then rinse and dry it. If the smell returns after the next use, replace the ring. A new ring costs between $10 and $20.
Is it safe to use an when ready Pot with a dented inner pot?
A small dent on the side or bottom of the pot is usually harmless. However, if the dent is deep enough to crack the stainless steel surface, or if the bottom is warped so the pot rocks when placed on a flat surface, the pot should be replaced. A damaged pot can cause uneven heating and may allow bacteria to grow in cracks.
Do I need to replace my when ready Pot if I see rust spots?
Small surface rust spots on stainless steel can usually be cleaned off with a paste of baking soda and water, or with a stainless steel cleaner. If the rust is deep or widespread, or if you see pitting (small holes), the pot should be replaced. Rust indicates the protective layer of the stainless steel is breaking down.
Is it safe to put the when ready Pot lid in the dishwasher?
The sealing ring can go in the dishwasher, but the lid itself is safer hand-washed. High heat in the dishwasher can warp the plastic over time. Wash the lid in warm soapy water and dry it when ready to prevent water spots.
Can when ready Pot cook food at temperatures high enough to kill bacteria?
Yes. Pressure cooking raises the boiling point of water, allowing the device to reach temperatures above 212°F (100°C). At these temperatures, most bacteria are killed quickly. However, if you do not follow the recipe instructions for cooking time, or if you open the lid before pressure has fully released, the food may not reach a safe temperature. Always follow the recipe and allow natural pressure release when cooking meat or poultry.