I know where it comes from... I was too stingy and didn't want to turn on the heating on cold rainy days- air too humid.
Can I somehow save the affected bids or do I have to remove them? ( Just fan without heater I’ll have about 10*C)
ohhh no you do not want to use mold bus ever. not for hash not for rosin not for flower. it can go in the compost or fed to worms. some people will just bag it and tie it up and out to the garbage. it is likely that your whole tent has spores. also i would try to harvest your tastly looking lettuce down there.
bad news is that has been there a long time if that substantial and it defintely produced spores. keep an eye out. it likely spread. it's 'there' long before a human eye can see it.
That is Botrytis. Remove the parts with this. I have same problem, is caused by cool, wet and foggy weather this time of year. I think I will have to harvest soon.