The prob should not be inside the enclosure either sandwished inbetween the uth and the glass or attacthed to the button of the uth if the uth is adhesive and already stuck. I do mine under neath personally so there isnt a bubble. And ir guns check surface tempatures.
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Oh so the probe is more accurate when its in between the UTH and glass, rather than on the glass inside the enclosure? I thought it would be more accurate if it were on the glass inside the enclosure.