The safest order for cleaning a lens is to blow off loose grit first, then wipe gently with a clean microfiber cloth only if a smear remains. Rubbing dust across glass is what causes fine scratches, so the blower always comes first.
Why Order Matters
Tiny hard particles sit on the surface of most lenses. If you wipe straight away, you drag them across the coating. A blower lifts them off without contact. After that, a cloth only has to deal with oils and moisture, which need much lighter pressure.
The Cleaning Sequence
- Remove the lens cap or hood, and hold the camera with the lens pointing down so dust falls away.
- Squeeze the blower a few times a short distance from the glass. Do not touch the surface with the tip.
- Check the glass at an angle in good light. If it looks clean, stop here.
- For a smear, use a clean part of a dry microfiber cloth and wipe from the center outward in a gentle spiral.
- If a mark persists, follow the lens maker’s guidance for a suitable cleaning fluid, apply a tiny amount to the cloth rather than the glass, and wipe lightly.
- Fit the cap back on and store the cloth in a clean pouch.
Things to Avoid
- Shirts, tissues, and paper towels, which can hold grit or fibers.
- Pressing hard or rubbing in circles repeatedly.
- Blowing with your mouth, which adds moisture and tiny droplets.
- Canned compressed gas held at an angle, since it may spray liquid; follow the label if you use it.
- Cleaning the rear element or sensor unless you know the correct method for your camera.
Care for the Cloth and Blower
A cloth that is dirty will spread dirt. Wash it according to its label when it feels greasy or looks marked, and let it dry fully. Keep the blower in a zipped pocket so its tip does not collect lint. A front filter is easier to clean and replace than a lens element, so many photographers keep one on for protection in dusty places.
Keep a spare cloth in each bag you use, so you never reach for a sleeve in a hurry. In wet weather, carry a small dry towel to remove droplets from the body and the front of the lens before you wipe the glass. Watch for fine sand and salt, which are especially hard on coatings. If you cannot clean a lens properly on location, put the cap on and leave it until you are somewhere calm with good light.
FAQ
How often should I clean a lens?
Only when it needs it. A few specks seldom affect pictures, and over-cleaning does more harm than dust.
What about salt spray at the coast?
Wipe gently with a clean cloth slightly dampened with fresh water, then dry, and follow the maker’s guide.
The Short Version
Blow first, wipe second, and use as little force as possible. Keep your tools clean and clean only when it matters.