Stay Clean / towel, cloth

According to some research, we have to wipe water from our hand with towels after washing hands or the amount of bacteria on your hands will be eight times more than the amount of bacteria before getting your hands wet.
As time goes by, the amount of bacteria on the towel will increase, and lead to the time to replace the old towel with a new one.
"Stay Clean" is the towel which can help us get rid of the problem.
The pattern on the towel will die out as it is exposed to the air.
As the pattern is exposed to the air for significant time, it will fade to remind us of it is the time to replace the towel with a new one.