Grabbed a herpstat 1 and had some prewire heattape sent over from RB. The herp was running at 92 for about 3 hours and the tapes actual reading with a gun was closer too 100 deg. The temp side of my tub (spaced about 1/4'' off tape") was about 90 and inside around 85 (papertowel substrate)

so questions... why is the heattape throwing 5+ deg over what i set the thermostat for ? Also should i go higher until i get 90-92 in the tub?