The amount you need to turn it up will be indicative of your ambient temps. With my ambient temps at 80, I only need the tstat set to 96 to get 89-90 in the tubs on paper towel. Where and how are you measuring the temps inside the tubs and what is your ambient temp? Also, where is the probe attached? It should be right in the middle of the tape on one of the vertical parts where it snakes up to the next row. You want it right in the middle of the rack - like row 3 of a 6 row rack.
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