Perspex cover in this heat?

[Beemum]

It came with my Swienty hive and I didn’t use it until the bees glued the roof on…but could it be causing problems in this weather? I’ve assumed the poly hive will be helping keep them as cool as they need (there’s no excessive bearding or condensation) but wonder if they’d be better without the cover for a while?

 

[Erichalfbee]

No problem. It separates the roof from the top bars....that's all.
Bees are pretty good at ventilating the box
Now if you had a wooden hive with a shallow roof it might so you would add some insulation under that roof