Hi bud ..... I may be off the mark here if so just disregard my post ....
Just concerned to read that you had TAPED the probe to the heatmat ... I read previously that the heat mat was inside the viv which suggests that the TAPE maybe inside the Viv ?!?!
One of the main rules I quickly learnt was that there should NEVER ever be ANY tape inside the viv/rub/enclosure .
I use a hot glue gun to secure any wires or probes INSIDE the vivs .
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