Biocube 14 heating up...84 degrees

Hello all!



So for months my biocube has been around 79 degrees. Lately, it is at 84 consistently, and not sure why or how to lower it.



Nothing has changed...its still cool here and house temp is around 70 as it has been all winter.



Heater has been unplugged

I took apart hood and made sure all fans are flowing perfect

i took pump out and cleaned it well

i took second pump out and cleaned it (this is the suction cup pump for flow)

I leave the top front access door open now



I cannot figure why this jump in almost 5 degrees...thoughts?



I am noticing my plain brown zoos are sort of melting, everything else looks fine



Thanks!