Washing your tips is a pain I know, but better to be safe, so hand wash your tips It's also cost effective.
Wilton will not replace any tips that have been damaged by vinigar or bleach.
I also put them in a washed out mayo jar, add a little dawn and a little hot water and shake it until the water is "colored". Replace the water a few times until its basically clear, and then rinse them individually. It takes most of the icing out of the tips, and you avoid the eons of time using the tiny little brush.