What's the best way of cleaning a filter without damaging any of the coatings when pure air blasting doesn't do the job?
Should I just use warm water or is stuff like isopropyl alcohol safe to use? How about avoiding or removing streaks left behind? Just a soft microfibre cloth?
Should I just use warm water or is stuff like isopropyl alcohol safe to use? How about avoiding or removing streaks left behind? Just a soft microfibre cloth?
