I live in a warm environment, so there are lots of spiders & webs, even on the turret cameras. I use this pool cage brush, they sell at the pool stores, with a 20' telescoping handle. You could probably even clean lenses of those high elevation cams by wrapping a terry cloth around the brush. This brush works very well and is always used. If there are 2 hard points within 10' apart, the spiders will run a web.