MacBook Pro moisture underneath when on electric blanket (Switched off)

[JamesMay82]

I have an M3 pro 14 inch. My Christmas gift of an electric blanket was great over winter but I noticed it would make my laptop bottom case condensate even when the laptop was running hot. I stopped using it and forgot about it.

Fast forward today its summer and I had same blanked switched off and laptop on top and it started getting wet again.. it never doest this if I use a regular blanket or cushion on my lap to stick laptop on.

any ideas why the electric blanket when switched off makes laptop sweat? just curious

 

[Fishrrman]

You might consider some kind of "buffer" between the blanket and the bottom of the MBP.

I'm thinking a "hand towel" or something like that, folded to fit.

Yes, I realize "it's clunky". But what works... works.

 

[JamesMay82]

You might consider some kind of "buffer" between the blanket and the bottom of the MBP.

I'm thinking a "hand towel" or something like that, folded to fit.

Yes, I realize "it's clunky". But what works... works.

Yes but it doesn’t do it with any other blanket.

I’m thinking the material in electric blanket even though off must be causing some sort of current between the laptop?

🤔

 

[DeltaMac]

I avoid using a laptop on any soft (heat retaining) surface, such as a blanket of any kind.
The moisture that you notice is probably the usual source for that, a temperature differential between the device and the conducting coils in the blanket (even when not powered). Good reason to not place your laptop on that blanket.
(just curious: why an electric blanket in the middle of summer? My 'lectric stays in my cedar chest until I start wearing bedsocks in the middle of winter...)

 

[Melbourne Park]

Maybe try leaving it upside down. The battery is further away ... maybe no condensation. Pretty strange tale though ... would a heated car seat do the same?

I assume its not a water bed? I just had to ask ...