I have glued on top the classic cheap heat sink [1], which came with the Pi. Once that was determined to be unsuficient, I slotted the aluminium foil (folded to

I have glued on top the classic cheap heat sink [1], which came with the Pi. Once that was determined to be unsuficient, I slotted the aluminium foil (folded to achieve sufficient thickness to stay in place) between the teeth. [1] https://www.buyapi.ca/product/aluminum-heatsink-for-raspberry-pi-4b-3-pack/ https://www.buyapi.ca/product/aluminum-heatsink-for-raspberr...