Besides the standard hot breath steaming and shirttail polishing that is...
- Alcohol, windex, or photographic lens cleaner?
- Microfiber cloth, lint free pads, Bounty or chammois cloth?
- On removable lenses, do you clean both ends?
- What if the mechanical IR cut filter has some specks on it?
- What if the sensor has some specks on it?
Can you (accidentally) affect the lens coating by cleaning too often? Does it have to be perfect or is some streaking ok?
Does it really make a difference anyway?