I know of several threads on cleaning reflectors but I'm don't have access to compressed air. What's a good non damaging way to clean water stains off a reflector? Alcohol? Ultrasonic? Distilled water?
Try those aerosol cans of compressed air used typically to clean computer
I normally use them to blast off the dust from a reflector
I actually got the stain from warm tap water. I can't even access the bit with the stains with a cloth as the head is sealed.