What is the best stuff to use for this, I know it is a silly question but I always get streaks and it bugs the crap out of me to no end!:cheers:

What is the best stuff to use for this, I know it is a silly question but I always get streaks and it bugs the crap out of me to no end!:cheers:
Soap and water, and dry it good.

I use paint brush to remove dust on face of gauges