Originally posted by niceshot In the Vivitar repair Manuals they discuss using a combo of 70 % ether and 30% alcohol as a cleaning agent. So much for fear Mongering.
I suspect that combination could get you arrested in the U.S. for "constructing an explosive device".
Vivatar's lenses must not have those sensitive coatings that Pentax lenses have. Btw, ammonia is a strong alkali, which, like the acidic vinegar, will emulsify grease and oil, but should not be used as a primary cleaner for the same reason alcohol, benzine, acetone and such shouild not be used.
I suggested vinegar solution only because someone earlier had stated the problems in terms of grease spots or something like that - for ordinary dirt and dust, I wouldn't use anything stronger than water or a commercial product of guaranteed quality. And preferably distilled water (avoiding having mineral spots on the glass after the water dries).