Thread: foggy scope

A quick fix is to gently warm the scope say in hot water cupboard for a couple of days until the fogging has all evaporated. Steal a bottle of Mrs clear nail varnish and apply a thin band of this around the edges of the lenses against the scope bells. Let dry. I used this many times when bush bound hunting for long periods of time. The fix works pretty well sealing out moisture.

Originally Posted by Woody

A quick fix is to gently warm the scope say in hot water cupboard for a couple of days until the fogging has all evaporated. Steal a bottle of Mrs clear nail varnish and apply a thin band of this around the edges of the lenses against the scope bells. Let dry. I used this many times when bush bound hunting for long periods of time. The fix works pretty well sealing out moisture.

Did this with my shitty old Weaver K4. It initially fogged up whilst on a hunt. Pissed me off so much that I used my knife across the 2 slots on the front lens and removed the lens and cleaned off the moisture. Reassembled and it was OK for the rest of the hunt.

When I got home I removed the same lens, stood scope upright in a very low setting oven for a couple of hours or so, then reassembeld it inside the oven. Never fogged again even though in theory I had needed to get scope above 100 degrees C to flash off the moisture.

Another scope I did the same except I did it at work and then ran dry nitrogen into it before reassembling.

If there was an issue with faulty seals or O rings my bubba method never addressed that but certainly my Weaver never played up again.

I might add that these were less than top of the line scopes. If they had been I would have sent them to the maker.

You don't need to mask with masking tape, just screw lens in with small gap left and paint nail varnish around thread, screw up to tight.