How to clean a Roomba’s charging contacts and cliff sensors

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How to clean a Roomba’s charging contacts and cliff sensors

I thought I’d been doing a good job keeping my iRobot Roomba 675 clean, carefully pulling clumps of hair off its brushes and wheels and emptying its bin after every cleaning. Little did I know that dust and gunk were building up in places where I wasn’t even looking.

First, consider the metal charging contacts on the Roomba’s base station. When was the last time you gave them a close look—or looked at them at all, for that matter?

I sure hadn’t, but when I did, I saw that instead of being completely silver, one of the two contacts had a rust-colored ring around it, while the other was almost completely discolored.

roomba 675 dirty charging contact Ben Patterson/IDG

This dirty Roomba charging contact used to be competely silver.

Having gunked-up charging contacts on your Roomba base station isn’t just a cosmetic issue. At some point, those contacts will get so dirty that your Roomba will have a tough time docking and charging, and you might find yourself with a near-dead Roomba the next time you want to clean your floors.

Also, have you noticed that your Roomba has been moving slowly or erratic lately? If the Roomba’s IR-enabled cliff sensors get too dusty and dirty, they’ll block the IR beam that’s supposed to reflect back, which means the vacuum might think that it’s continually approaching a wall or about to tumble down the stairs.

roomba 675 dirty cliff sensor Ben Patterson/IDG

Guh-ross!

I admit that I’d never bothered to look closely at my Roomba’s cliff sensors until very recently, and when I did … yuck. One of the sensors was almost completely covered in dirt, while the other three were clearly due for a wipe-down.

How to clean your Roomba’s charging contacts

Roomba manufacturer iRobot recommends regularly cleaning your vacuum’s charging contacts and cliff sensors with a damp melamine foam. If you’re wondering what melamine foam is (I know I was), just think Mr. Clean’s Magic Eraser (or one of these brands).

roomba 675 clean charging contact Ben Patterson/IDG

You’ll need to apply a fair amount of elbow grease to clean the charging contacts on your Roomba’s home base.

I ran my Magic Eraser under the kitchen faucet, wrung it out, then began polishing the charging contacts on my Roomba’s home base. It took a surprisingly amount of elbow grease to rub the gunk off, but eventually the silver began shining through again. Also, don’t forget to clean the corresponding contacts on the underside of the Roomba itself.

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