Heat issues

I just moved my daughters snake to a plastic bin since we couldn't get the humidity over 40% using just a heat lamp. I picked up some heat tape, thermometer/hygro and dimming switch for the setup. I have the sensor inside under the green carpet on the hot side and the therm on the cool side. The humidity is now up near 70%, hot side at 92 degrees but the cool side is only 75 degrees. The plastic tub is sitting on a dresser currently. I would like to have the warm side about 90 and cool side about 80 but I cant get the cool side up without turning up the heat pad which would be too much for the snake. I see others with their bins on wooden shelves that is covering the back and sides. Am I loosing too much heat by not having the sides and back covered/insulated?

Thanks!

75 isn't too bad for the cool side. You could be losing heat that way, but it appears your temps are just fine to me.

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Originally Posted by LGray23

75 isn't too bad for the cool side. You could be losing heat that way, but it appears your temps are just fine to me.

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Ok good, by the way I do have quite a few holes on the cool side to help with humidity but the air still seems quite stagnant. Is that normal for this type of set-up?

Yes, tubs hold heat and humidity (but also lose heat and humidity if taken off the heat source) much quicker than glass.