Put the tablet in the detergent dispenser, not loose in the tub

Most dishwashers have a small door or compartment on the inside of the door itself — usually on the left side. Open that door, drop the tablet in, and close it. The machine releases the tablet at the right moment during the wash cycle, which gives you better cleaning than tossing it loose into the tub.

If your dishwasher has no dispenser door, or if the door is broken, you can place the tablet loose in the bottom of the tub before you close the door. It will dissolve during the cycle, though you may not get quite as clean a result because the detergent releases all at once instead of in stages.

Never put a tablet in the rinse aid compartment or the salt compartment — those are for different products and will damage your machine or produce poor results.

Key Takeaways

  • The detergent dispenser is a small door on the inside of your dishwasher door, usually on the left side, and is the correct place for a tablet.
  • If your dispenser door is missing or broken, place the tablet loose in the bottom of the tub before starting the cycle.
  • Never place a tablet in the rinse aid or salt compartments, as these are designed for different products.
  • Using the dispenser gives better results than loose placement because the tablet dissolves at the optimal time during the wash.

Finding the dispenser door on your machine

The dispenser is almost always built into the inside of the door, not the tub itself. Look at the inside of your dishwasher door when it is open — you will see a small rectangular compartment, usually with a button or latch on the front. This is your detergent dispenser.

On some older or budget models, the dispenser may be a straightforward open cup rather than a door. If that is the case, drop the tablet directly into that cup. On high-end models, you may find a second compartment for a second dose of detergent, which releases during the rinse cycle — use only one tablet unless your manual says otherwise.

If you cannot locate a dispenser at all, check your dishwasher manual or look at the manufacturer's website using your model number. The model number is usually on a sticker inside the door frame or on the side of the tub.

What happens if you put the tablet in the wrong place

Placing a tablet in the rinse aid compartment will not clean your dishes — the rinse aid is a liquid that reduces spotting and improves drying, and a tablet will not dissolve properly in that small space. Your dishes may come out spotted or wet, and you will have wasted the tablet.

Putting a tablet in the salt compartment is worse. Salt is a granule that regenerates the water softener inside your machine. A tablet will clog the salt chamber and may damage the softening system, leading to hard water spots on your dishes and potential repair costs.

Loose tablets in the tub work, but less effectively. The tablet dissolves when ready when the cycle starts, releasing all the detergent at once. A dispenser releases the detergent in stages, so more of it reaches your dishes at the moment when they need it most.

Tablets versus powder and liquid detergent

Tablets are pre-measured, so you do not have to guess how much detergent to use. Powder and liquid detergent go into the same dispenser compartment, but you have to measure them yourself — too little leaves dishes dirty, too much wastes money and can leave residue.

Tablets also dissolve more slowly than powder or liquid, which is why the dispenser timing matters. If you use powder or liquid, the dispenser releases it when ready, and that is fine because those forms dissolve fast enough to work throughout the cycle.

If your dispenser is broken and you have only tablets on hand, loose placement will still clean your dishes — it is just not optimal. If you have powder or liquid available, use that instead until you repair the dispenser.

Compact and portable dishwashers

Compact countertop dishwashers and portable models that connect to your sink have the same dispenser setup as full-size machines, just in a smaller package. Look for the compartment on the inside of the door — it will be proportionally smaller, but it works the same way.

Some very small portable models may not have a dispenser at all. If that is the case, place the tablet loose in the bottom of the tub. Check your manual to confirm, because some compact models use a different detergent format altogether.

Frequently Asked Questions

Can I use two tablets in one wash?

You can, but it is usually unnecessary and wastes money. One tablet is formulated for a standard load. If your dishes are heavily soiled, run a longer or heavier cycle instead. Two tablets may leave detergent residue on your dishes.

What if the dispenser door won't close?

If the latch is broken, you can still run the dishwasher with the tablet loose in the tub. The tablet will dissolve and clean your dishes, though results may be slightly less effective. Contact the manufacturer or a repair service if you want the dispenser fixed.

Do I need to unwrap the tablet before putting it in?

No. Tablets come in a water-soluble wrapper that dissolves during the wash cycle. Do not unwrap it — the wrapper is part of the design and helps the tablet dissolve at the right time.

Can I break a tablet in half to use less detergent?

You can break a tablet, but it is not recommended. Tablets are formulated as a single unit, and breaking them changes how they dissolve and release detergent. If you want to use less detergent, switch to powder or liquid so you can measure it yourself.

What if my dishwasher has a three-compartment dispenser?

Some machines have a main detergent compartment, a rinse aid compartment, and a salt compartment. Use the tablet only in the main compartment — it is usually the largest one on the left side of the door. The other two are for their specific products only.