I reuse them many times. Before I take the applicator off, I hold the bottle straight up and press it to clear most of the ca out of the it. Then I wipe the applicator with a paper towel before removing it from the bottle. I then blow through the applicator using a compressed air can you can buy at any office supply store. They are used for blowing dust off keyboards. Then I throughly wipe off the bottle tip before replacing the cap. Once it in awhile I need to cut a short amount off the applicator if it has become clogged.

Bruce