The accumulation of these fumes can generate small explosions which displace the parts.
You need to place shims between the metal plate and the honeycomb to leave a gap of a few millimeters and allow air to circulate.
You will need a 40x40mm fan, they are available in USB, 12V, or 24V.
I used M3 brass inserts for the fan mount
The author marked this model as their own original creation.