Hygrometer help/recommendations?

So, I have these Acurite's in my snake tanks https://www.acurite.com/humidity-tem...tor-00613.html and I'm not sure if they're really accurate or not. When I put them all side by side they're all maybe 2 percent off from each other but when I put them in my snake tanks they all read very high humidity. I have my snakes in glass tanks but I have poster boards on the side and aluminum foil on the top, etc. Anyway, I'm confused because I put them in the tanks and they all read high humidity's, anywhere from 80's to 90's. However, when I put my hand in their tanks it doesn't feel that humid. Are there any other good recommended Hygrometers I can get or anything I can do to test my hygrometers? I don't want to not trust them but then them end up being right and then the humidity is too high. etc.

We all use those. And your hand won't gage humidity like the actual gauges.

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