I was going to buy a lens cleaning kit but i have been busy and don't have the time. I do however have distilled water and a microfiber cloth. Is it safe to use these to clean a lens? About using water, is distilled water better to use then tap water? Also how would i go about wiping the lens surface. I think i will wet the cloth with distilled water and then gently rub the lens surface. What do you guys think?