Hey Shawshank just a thought, have you guys looked into mattress liners that have cooling effect properties? We got one when we brought a new mattress, and it’s amazing at dissipating heat while still being warm where necessary. Sounds impossible but it works. Then we added sheets made from 100% hemp, the combo has been worth every penny. Couldn’t remember if you’ve been down this path already or not.
Have a great day you two~