How damaged is your lens coating???
Seriously? Most professional lens techs are using high grade ethanol and/or heptane or hexane to clean lenses. What do you think naphtha is? It's pentane/heptane/hexane based on the particular distillation process and "cut" used. Why do they use it? It's entirely non polar, will not harm surrounding materials, and evaporates incredibly fast.
Originally Posted by benjiboy
Everything else is overpriced water+alcohol. Lens cleaner manufactures are having a laugh.
Stop worrying about grain, resolution, sharpness, and everything else that doesn't have a damn thing to do with substance.