I'm sure this has been answered somewhere, but I couldn't find it.

I notice a big difference between the temperatures when I tape my probe down to the bottom of the tub and when I just place it in there under the substrate. This makes sense, I suppose, because when taped, the probe has no contact with the outside air. Which is better in terms of getting an accurate reading of what my BP actually experiences? I have Flexwatt, if that makes a difference to you.

Thanks!