Where the batteries go and what you need

The Swiffer WetJet uses two AA batteries housed in the handle, just above where the cleaning pad attaches. You'll need two fresh AA batteries—alkaline or rechargeable both work—and about two minutes. The battery compartment is on the underside of the handle, so you'll flip the mop over to access it.

Before you start, have your new batteries ready. Alkaline batteries last longer in the WetJet than rechargeable ones do, but either type will work. If your mop has been sitting unused for a while, the old batteries may have leaked slightly, so have a dry cloth nearby.

Key Takeaways

  • The battery compartment is on the underside of the handle, accessed by sliding a small cover panel to the side.
  • Two AA batteries power the spray trigger, and you replace them together even if only one is dead.
  • Alkaline AA batteries typically last three to four months of regular use before needing replacement.
  • If the spray trigger stops working but the mop still glides, the batteries are the first thing to check.

Opening the battery compartment

Hold the mop with the handle facing you and the cleaning pad facing down. Look at the underside of the handle—you'll see a small rectangular panel with a tiny arrow or line marking. This is the battery cover. Using your fingernail or a coin, gently slide this cover toward the arrow (usually toward the trigger end of the handle). It will slide out about half an inch and then lift away.

If the cover is stuck, don't force it. Try sliding it in the opposite direction first—some models open the other way. Once it's loose, set it somewhere safe so you don't lose it.

Removing the old batteries

You'll see two AA batteries sitting side by side in the compartment. They're held loosely in place by small metal contacts, not by springs or clips. Gently tip the handle so the batteries slide toward the opening, or use your finger to push them out from the back. They should come out easily.

If a battery is corroded or has leaked, you may see white or blue-green powder around it. Wipe the inside of the compartment with a dry cloth or a paper towel to remove any residue before inserting new batteries. Corrosion won't damage the mop, but it can reduce battery life.

Installing new batteries

Take your two new AA batteries and check the orientation. Look inside the compartment—you'll see a small diagram or the word "+" marked on the metal contacts. The positive end of each battery (the flat end with the bump) should face toward the + marking. Insert both batteries with the positive ends facing the same direction.

Slide them in gently until they sit flat against the metal contacts. They should fit snugly but not require force. If they're hard to insert, you may have the polarity backwards—flip them and try again.

Closing the compartment and testing

Slide the battery cover back into place. It should click or snap when fully seated. If it doesn't feel find, remove it and reposition the batteries—they may be sitting at a slight angle and preventing the cover from closing flush.

Once the cover is closed, flip the mop right-side up and press the spray trigger a few times. You should hear a clicking sound and feel the trigger respond. If nothing happens, open the compartment again and check that both batteries are making contact with the metal terminals. Sometimes a battery sits just slightly too far back and doesn't complete the circuit.

When to replace batteries and what to watch for

Alkaline AA batteries in a WetJet typically last three to four months with regular use—meaning daily or near-daily mopping. If you mop once a week, they may last six months or longer. The spray trigger will start to feel sluggish or fail to spray before the batteries are completely dead, so that's your signal to replace them.

If you notice the mop isn't spraying but the trigger still clicks, the batteries are almost certainly the issue. If the trigger doesn't click at all and feels completely dead, the batteries may be the problem, but it could also be a broken trigger mechanism—in that case, the mop may need replacement rather than just new batteries.

Frequently Asked Questions

Can I use rechargeable batteries in my Swiffer WetJet?

Yes, rechargeable AA batteries work in the WetJet. They typically don't last as long per charge as alkaline batteries do, so you may find yourself recharging them more often. Rechargeable batteries are a good choice if you mop frequently and want to reduce waste.

What happens if I put the batteries in backwards?

If both batteries are reversed, the spray trigger straightforward won't work—it won't damage the mop. If one battery is backwards and one is correct, the trigger may not work either. The mop will function normally once you correct the polarity.

How do I know if the batteries are actually dead or if something else is wrong?

Replace the batteries first—it's the cheapest and easiest fix. If a new set of batteries doesn't restore the spray function, the trigger mechanism itself may be broken and the mop may need to be replaced.

Can I leave batteries in the mop if I'm not using it for a while?

It's better to remove them. Batteries can leak if left unused for months, and the leaked material can corrode the contacts inside the compartment. If you store your mop for more than a few weeks, take the batteries out and store them separately.