Hot glue is definitely the best option for the probes.
My general rule for ambient temps is high 80s on the hot side and low 80s on the cool side. Nothing under 78, nothing over 90. This is controlled by two thermometers and a light dimmer hooked up to a heat lamp.
My UTH is regulated by a Hydrofarm thermostat set at 92 which means the hottest the hotspot gets is about 94 and then shuts off, usually dropping to just below 90 before it turns back on.
I try to keep my humidity at about 50% or higher. 60% or higher during shed.
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