When we heard that astronauts aboard the International Space Station took a spare toothbrush along on a spacewalk today and used it to help clean debris from around some bolts they needed to secure in order to install a power unit, it got us thinking.

Just how versatile are old toothbrushs? We know we've used them to:

Clean bike gears.

Get grime out of our hubcaps.

Get at the crust around a car battery's terminals.

Polish jewelry.

Reach into aquarium filters.

There must be, though, many other ways they've been used. Please put on your "Hints from Heloise" hats and share in the comments thread.

By the way, NPR's Joe Palca tells our Newscast Desk that the two astronauts' spacewalk was a success. He says that:

"The space station gets its power from an array of solar panels. Four boxes, called main bus switching units, deliver that power to the electrical system on board the station. One of those units had stopped working properly. The station has a spare, so NASA decided to replace the malfunctioning unit.

Excerpt from:

The Toothbrush: It's In The Space Station's Toolbox. How About Yours?