Nothing is more annoying than grabbing your Swiffer WetJet only to find it won’t spray. Nine times out of ten, the issue is the batteries. They either need replacing, are installed the wrong way, or the compartment isn’t shut properly.
This guide shows you exactly which batteries the WetJet uses, where to find the compartment on different models, and how to swap them out step by step. You’ll also get quick fixes for stuck doors, weak sprays, and corroded contacts—so you can get back to cleaning in minutes.
Quick Answer (Summary)
- Battery type: Most Swiffer WetJets take 4 AA alkaline batteries.
- Location: The battery compartment is either in the handle near the trigger or the mop head/base, depending on the model.
- Fast tip: Always check the + and – signs when installing. One battery flipped the wrong way is enough to stop the sprayer.
Step-by-Step Replacement Guide
Step 1: Locate the Battery Compartment
Swiffer WetJet models have two common layouts:
- Handle compartment: On most newer WetJets, the batteries sit inside the handle near the trigger. Look for a small sliding cover or lines showing where to press.
- Base compartment: Some older units place the batteries in the mop head. You’ll see a small tab or slot on the front or side that opens the tray.
Step 2: Open the Compartment
- Handle style: Press on the ridged lines and slide the cover upward. The tray should pull out smoothly.
- Base style: Push the release tab and slide the door open. If it feels stiff, press firmly but gently—forcing it can crack the latch.
Step 3: Remove the Old Batteries
Take out all the batteries. Check for:
- White or green residue: This means corrosion. Wipe the contacts with a cotton swab dipped in vinegar, then dry completely.
- Loose springs: Make sure the contacts are springy enough to hold new batteries tightly.
Step 4: Insert the New Batteries
- Use 4 fresh AA alkaline batteries (not rechargeable).
- Match the + and – signs with the diagram inside the tray.
- Insert them firmly so each end touches the spring or contact plate.
Step 5: Secure the Compartment
Slide the cover back until it clicks. If the cover feels loose, the mop may not power on—make sure it’s sealed tightly before use.
Troubleshooting After a Battery Swap
Even with fresh batteries, your Swiffer WetJet might still give you trouble. Here’s how to fix the most common problems.
Mop Still Not Spraying
- Check polarity: Make sure every battery matches the + and – diagram. One flipped cell is enough to stop the sprayer.
- Close the door fully: A loose compartment door can break the connection. Push until it clicks.
- Look at the contacts: If they look dirty or dull, gently clean them with a cotton swab dipped in vinegar, then dry.
- Confirm the bottle is locked in: If the cleaning solution isn’t seated correctly, the spray won’t trigger.
Battery Compartment Door is Stuck
- Press the release tab or ridged lines firmly.
- If it doesn’t move, slide a flat, dull tool (like a butter knife) under the latch and pry gently.
- Avoid forcing it—excess pressure can crack the plastic.
Corroded or Leaking Batteries
- Remove them right away.
- Wipe the compartment with a vinegar-damp cotton swab.
- Dry completely before inserting new batteries.
- If corrosion has eaten into the metal contacts, the mop may need replacing.
Tip: Always use fresh AA alkaline batteries from the same pack. Mixing old and new weakens performance and shortens lifespan.
Related Tips
Which Batteries to Buy
- Always use AA alkaline batteries for the WetJet.
- Stick with trusted brands (Duracell, Energizer, Panasonic) for longer runtime.
- Avoid carbon-zinc or rechargeable batteries—they don’t hold charge well and can cause weak spray.
- Replace all batteries at the same time. Mixing old and new can drain the fresh ones faster.
Care & Storage
- Remove batteries if you won’t use the WetJet for a few weeks. This prevents corrosion.
- Store upright in a dry corner. Don’t lean it against radiators or damp walls.
- Keep compartments clean: Wipe contacts with a dry cloth every couple of months to stop dust build-up.
- Check the seal: If the door feels loose, re-snap it firmly—shaking during storage can break connection points.
FAQs
What kind of batteries does a Swiffer WetJet use?
Most WetJet models use 4 AA alkaline batteries. Always check your compartment label before replacing.
Where is the battery compartment on a Swiffer WetJet?
On newer models, it’s in the handle near the trigger. Some older models place it in the mop head with a sliding tab.
Can I use rechargeable batteries?
No. Swiffer recommends AA alkaline only. Rechargeables often don’t deliver consistent power, leading to weak spray.
How often do I need to change the batteries?
It depends on use. With daily cleaning, expect to replace them every 1–2 months. Light users may go longer.
What batteries does the Swiffer Power Mop use?
The Power Mop typically ships with 2 AA alkaline batteries included in the starter kit.
Why won’t my WetJet spray after new batteries?
Re-check the polarity, make sure the door is fully closed, and confirm the solution bottle is clicked in. If it still won’t spray, the nozzle may be clogged.
