I am using flurouracil on the top of my hands. I apply with an applicator and wash my fingers with soap and water after application. How long should I wait after each application before I use water on the affected area? I use it once early in the am after I wash my face and late in the day. I take a shower every night and do not want to wear the cream at because I'm afraid I may touch my face or eyes in my sleep. Any suggestions would be greatly appreciated.