Liquid baby powder sounds good. My technique: I sit on the toilet, pour a bit of powder into one slightly cupped hand, reach around behind me and poof it up into the rectal area. Make sure you are nice and clean of course. It works for me. The excess powder is pretty much contained within the bowl. You lose some but most goes where it's needed. Flush the excess away. Begin by using less. If you need more apply again. Hope this helps. I treat the rash with jock itch cream and antibiotic ointment.