Electric toothbrushes give kids--and adults--one less excuse to brush after meals. Unless the toothbrush is broken. Luckily, electric toothbrushes are relatively easy to fix and inexpensive to replace.

How Does It Work?

An electric toothbrush uses a small DC (direct current) motor to move the toothbrush shaft from side to side or back and forth, depending on the model. Most models are cordless, using a charger to replenish power. Less-expensive models operate on batteries.

Components inside an electric toothbrush charger typically are sealed from entry, so if it goes bad you must replace the entire unit.

Problems usually involve either the brush heads, which are easily replaced if worn or faulty, or the charger. The power handle is typically sealed to prevent shock, so internal repairs should be left to a professional.

Who can repair your sealed electric toothbrush? Because they are small motorized electric appliances, nearly any small appliance repair shop can do it. Make sure you clean the unit well before delivering it to the repair person. Also be sure it's worth the cost of repairs. It might be more cost effective to just buy a new one.

How Can I Identify the Problem?

If the appliance doesn't work at all, make sure the power is on at the outlet, then test the electrical cord and battery recharger with a multimeter and replace the cord or charger if needed.

If the unit still doesn't work, clean the charger post. If the charger shocks the user, have it professionally serviced or replace it.

Fix-It Tip

Even a poorly running electric toothbrush is good for something. You can recycle it for use as a grout scrubber, or use it to clean hard-to-reach areas around sinks.

What Parts, Materials, and Tools Do I Need?

Replacement parts for electric toothbrushes--including new brush heads--are available from the manufacturer and aftermarket suppliers and are typically sold through drug and discount stores. If you do need to work on an electric toothbrush, about the only tools you'll need are a screwdriver and maybe a multimeter.

What Are the Steps to Fixing It?

Clean a charger post:

1. Unplug the charger from the outlet.
2. Use a fine emery cloth to clean the charger post.
3. Spray the charger post with electrical contact cleaner, then wipe excess cleaner away.

Clean a brush head:

1. Remove the brush head from the toothbrush driver.
2. Run the brush head under warm water for a minute to loosen debris and sanitize the head.
3. Reinstall the brush head.

Fix-It Tip

Depending on use, replace the brush head every three to six months unless directed otherwise by the manufacturer or your dentist.