Where the batteries go and what type you need

The Swiffer WetJet holds two AA batteries in a compartment on the handle, just above where the cleaning solution bottle attaches. To change them, you'll need two fresh AA batteries — alkaline or rechargeable both work fine. The battery door is a small rectangular panel on the back or side of the handle, depending on which WetJet model you own.

Most people don't realize the batteries drain faster than they expect because the motor runs continuously while you're cleaning. If your WetJet is spraying solution but the pad isn't vibrating, or if it's vibrating weakly, the batteries are likely dead or nearly dead. Replacing them takes about two minutes and costs a few dollars.

Key Takeaways

  • The battery compartment is a small rectangular door on the handle, held in place by a single screw or a sliding latch depending on your model.
  • You need two AA batteries, and both should be the same type — don't mix old and new or alkaline and rechargeable in the same compartment.
  • Insert the batteries with the positive end (+) facing toward the spring inside the compartment, or they won't make contact.
  • If the WetJet still doesn't vibrate after you install fresh batteries, the motor itself may have failed and the handle will need to be replaced.

How to open the battery compartment

Look at the back or side of the WetJet handle for a small rectangular panel about the size of a postage stamp. On older models, this panel is held by a single Phillips-head screw. On newer models, it slides open without tools — push or slide it in the direction the arrow indicates, and it will pop out slightly so you can pull it free.

If your model has a screw, use a Phillips-head screwdriver (a small one works best) and turn counterclockwise until the screw is loose enough to remove by hand. Don't force it; if it's stuck, try a slightly larger screwdriver or tap the handle gently with a hammer to loosen corrosion. Once the screw is out, the panel should lift away easily.

Removing the old batteries

Pull the battery compartment door straight toward you. Inside, you'll see two AA-sized slots, usually with a metal spring at one end of each slot. The old batteries may be stuck if they've been in there for months — gently rock them side to side and pull them out. If they're corroded or leaking, wear a glove or wash your hands afterward, as battery acid can irritate skin.

Look inside the compartment for any white or blue crusty buildup, which is corrosion from old batteries. If you see it, wipe the inside of the compartment with a dry cloth or a cotton swab. Corrosion prevents new batteries from making good contact, so cleaning it out is worth the extra 30 seconds.

Installing the new batteries correctly

Take your two new AA batteries and check the orientation. Each battery has a flat negative (−) end and a raised positive (+) end. Insert each battery with the positive end facing the metal spring inside the compartment. The spring will compress slightly as the battery slides in, and you should feel it click or seat firmly.

Both batteries must face the same direction — positive ends toward the springs. If one is backward, the WetJet won't work at all. Double-check before you close the door. A common mistake is inserting one battery correctly and the other backward, which wastes time troubleshooting later.

Closing the compartment and testing

Slide the battery door back into place. If your model has a screw, reinsert it and turn clockwise until it's snug — don't overtighten, as you can strip the plastic threads. If your model has a sliding latch, push it until you hear or feel it click into place.

Now test the WetJet. Fill the solution bottle with water or cleaning solution, attach it to the handle, and press the trigger. You should hear the motor hum and feel the pad vibrate. If nothing happens, open the compartment again and check that both batteries are inserted correctly with the positive ends facing the springs. If the motor still doesn't run, the motor itself may have failed and you'll need to replace the handle.

Why your WetJet might not work after a battery change

If you've installed fresh batteries correctly and the WetJet still won't vibrate, the problem is usually not the batteries. The most common culprit is a loose or corroded connection inside the compartment. Remove the batteries again, clean the inside of the compartment with a dry cloth, and reinstall them, making sure they're seated all the way in.

If that doesn't work, the motor or the electrical contacts inside the handle may be damaged. This happens occasionally if the WetJet was dropped or if old batteries leaked inside the handle. In that case, the handle itself cannot be repaired and will need to be replaced — you can buy a replacement handle separately without buying a whole new WetJet system.

How often to change the batteries

Most people change WetJet batteries every three to six months, depending on how often they clean. If you use the WetJet several times a week, you'll likely need new batteries every three months. If you use it once a week or less, they may last six months or longer.

A good habit is to keep a spare pair of AA batteries in the cabinet under your sink so you're never caught without them. When the vibration gets weak or stops, swap in the fresh pair right away rather than waiting until the motor dies completely. This keeps your cleaning pads working at full strength and prevents you from having to scrub harder to compensate.

Frequently Asked Questions

Can I use rechargeable batteries in my Swiffer WetJet?

Yes, rechargeable AA batteries work fine in a WetJet. They typically have a lower voltage than alkaline batteries, so the motor may vibrate slightly less powerfully, but the pad will still clean effectively. Keep a second set charged and ready to swap in when the first set runs down.

What if one battery is dead but the other still has power?

Replace both batteries at the same time, even if only one seems dead. Mixing an old battery with a new one causes the old one to drain the new one faster, and the voltage mismatch can weaken the motor. Always use two batteries of the same age and type.

Is it normal for the battery compartment screw to be really tight?

Yes, manufacturers often tighten them firmly at the factory. If you can't budge it with a Phillips screwdriver, try a slightly larger screwdriver or tap the handle gently with a hammer to break the corrosion seal. Pliers wrapped in a cloth can also give you better grip without stripping the screw head.

Can I leave the batteries in the WetJet when I'm not using it?

It's fine to leave them in for a few weeks, but if you won't use the WetJet for a month or longer, remove the batteries. This prevents slow drain and reduces the risk of corrosion if the batteries start to leak. Store the batteries separately in a cool, dry place.

Why does my WetJet vibrate weakly even with new batteries?

Weak vibration usually means the batteries aren't making good contact with the springs inside the compartment. Remove the batteries, clean the inside of the compartment with a dry cloth, and reinstall them, pushing firmly until they seat completely. If vibration is still weak, the motor may be wearing out and the handle may need replacement.