What cleaning solution is best

[Bonjour (Bo)]

@olddogTim

I am surprised that nobody mentioned acetone. That seems to be the only thing I tried that dried with NO streaks without rubbing after it dries ( it dries very quick ). We don’t have to worry about lens coatings like they have on cameras, a coating that is on the outside of the mirror or focus lens, would burn up with the beam of the laser. Any ideas.

Probably because most tube and mirror manufacturers specifically say “don’t use acetone”.

Denatured alcohol is great for 99% of the time you need to clean.