@affordablehousing The bucket collects the food scraps for about four days and then goes to the compost bin outside to become compost. The mold is not on the bucket or the tray that the bucket sits on. The bucket gets cleaned regularly (at least once a week).
The mold in the cupboard is black, while compost molds are green or grey and usually fuzzy.
The garbage drawer doesn't get moldy at all (Yes all the garbage is collected in a sliding drawer thingy with sorting compartments of recycling, landfill waste and organic material that we wouldn't compost at home such as meats, bones and kleenex) This was a very fancy kitchen in 1969.
@SunnyDays - I have some charcoal for the grill - gonna try a small take away container full.
@nereo - I am going to leave the cupboard door open overnight. I am also going to put a double bumper on the doors so they sit a little proud of the face of the cupboard. We didn't reinstall the rubber on the one door that forms a seal with the other door. It was tatty and gross, unlike the one on the pot drawer that we left on. (All the double doors had a rubber overlap on the back of the right door that didn't prevent them from closing or pulled the other door open. It just stops you from being able to see into the cupboard) There is an air gap but no circulation.
I have to think further about how to reduce the condensation. We were having a problem in the basement because the water supply is much colder than air temperature.
@Sibley - now to find this type of product in the era of COVID.
I hate having to go out to the compost bin every day and I also hate looking at the ugly bucket so that is why I have this thing in the cupboard. I am going to try everything else first before giving up my convenient tidy solution. I think I would rather wipe down the RO once a week than not have a scrap bucket. If I put a lid on the bucket - that would also keep down the moisture, but then add another step to getting the orange peels...I finally got those kids trained to toss the banana peels without the damn sticker. A lid might be too much!