I found that by removing the soggy charcoal filter, that solved the problem of getting enough oxygen in there. Bit of a design flaw.
OK, I might do this. Have already fully opened the vent - there's an awful lot of condensation.
You only want it open a very small way.
@Marron started
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I found that by removing the soggy charcoal filter, that solved the problem of getting enough oxygen in there. Bit of a design flaw.