Quick answer
Clean eyepieces only when needed using a blower, soft brush, and lens tissue with solution; store them in a sealed case with desiccant to prevent fungus and dust. Waterproof eyepieces tolerate more moisture but still need the same care. Always cap and case eyepieces between sessions.
Why fungus and dust are your eyepieces' worst enemies
Fungus grows on organic residue left by eyelashes, skin oils, and moisture. It etches coatings permanently. Dust scratches coatings when you wipe it dry. Both problems are preventable with a few habits.
Waterproof eyepieces like the 62° Series resist internal fogging, but external fungus and dust still attack the glass. Used gear may arrive with hidden spores, so inspect and clean carefully.
Tools you need (and what to avoid)
Use a rubber bulb blower, a soft camel-hair brush, lint-free lens tissue, and a quality lens cleaning solution. Avoid canned air (propellant residue), rough cloth, and household cleaners. For waterproof eyepieces, you can use slightly more solution, but never soak them.
Step-by-step cleaning routine
For a full walkthrough, follow the steps below. Each step includes a common mistake to avoid.
Storage that stops fungus before it starts
Store eyepieces in a sealed case with fresh desiccant packs. Keep the case in a dry, stable-temperature room. If you live in a humid climate, consider a dry cabinet. Used gear should be stored separately for a few weeks to ensure no spores spread.
The USED Vernonscope Binoviewer with Eyepieces includes a padded Nanuk 910 case, which is a good example of a sealed, shock-resistant storage solution. Always replace desiccant every few months.
Eyepiece cleaning and storage steps
- Blow off loose dust: Use a rubber bulb blower to remove loose particles. Hold the eyepiece at an angle so dust falls away. Never blow with your mouth; moisture and spit can cause fungus.
- Brush away stubborn particles: Use a soft camel-hair brush to gently sweep away remaining dust. Work from center to edge. Do not press hard; bristles can scratch coatings if grit is trapped.
- Apply cleaning solution to lens tissue: Place a drop of lens cleaning solution on a fresh lens tissue. Never apply solution directly to the eyepiece. Too much solution can seep into edges and cause fungus later.
- Wipe gently in a circular motion: Starting at the center, wipe outward in a spiral. Use a new tissue for each pass if needed. Rubbing back and forth with a dirty tissue can drag grit and scratch the coating.
- Inspect and repeat if necessary: Check under a bright light. If streaks or smudges remain, repeat with a fresh tissue. Overcleaning is worse than leaving a minor smudge; clean only when needed.
- Store in a sealed case with desiccant: Place eyepieces in a padded case with fresh desiccant packs. Keep caps on when not in use. Replace desiccant every 3–6 months, or when the indicator changes color.
Product facts to guide your care
- 62° Series Waterproof Eyepiece 32mm 2" (AR Purged) (EPWP6232LE-01): 62° Series Waterproof Eyepiece 32mm 2" (AR Purged) (EPWP6232LE-01) is waterproof and argon purged. Waterproofing prevents internal fogging and fungus growth inside the eyepiece, but external surfaces still need regular cleaning.
- USED Vernonscope Binoviewer with Eyepieces: USED Vernonscope Binoviewer with Eyepieces is in fair condition with cosmetic damage but optics are unaffected and of high quality. Includes Baader 2" diagonal, Vixen LV 1.25" 8-24mm Zoom Eyepieces, Baader 1.7x Glass Path Corrector, and padded Nanuk 910 case. Used gear may have hidden dust or fungus; the included case helps protect it, but inspect and clean thoroughly before use.
