Your methods seem a bit unorthodox.
Probably the best way to stabilize humidity is to place the eggs in a sealed container (with a couple tiny air holes) and to open it only rarely.
I think most breeders place their eggs in substrate (perlite, sand, or vermiculite) in a plastic container. The substrate is moistened (some people moisten it just until squeezing it will went their fingers, or squeezing it forms a few drops, others follow a specific formula). A lid is placed on the container. Two tiny holes are drilled into the lid to allow for air. The container is kept closed for the duration of the incubation period, except for opening it occasionally to check the moistness of the substrate and adding tiny bits of moisture (to the edge of the substrate- not the eggs) if necessary. You really don't even have to open the lid to check moisture. You can see tiny drops or mist of moisture on the sides and sometimes the top.
Some people incubate there's in a closet at room temperature but I have not tried that.
I followed Kingyonga's temperature of 78 degrees, and my veiled eggs began hatching at 6 1/2 months. I kept them in my feeder closet, which was set at 78 degrees.
I used an incubator for my panther eggs (because I took them through a diapause first), but still placed them in the incubator in their sealed container.
Here is a great thread where Kinyonga posts some excellent instructions:
https://www.chameleonforums.com/veiled-chameleon-breeding-questions-8640/
And here is another interesting thread, to show you that others have used different methods successfully. But I think all basically do their eggs in well sealed containers, with tiny holes for air.
https://www.chameleonforums.com/incubating-veiled-eggs-8245/
