it looks like we're having a brief warming trend here, with 60's F over the next day or two, then back to 40's and 50's for the next week or so. I wanted to check on the status of the top feeders (ML 4 gallon) which I had added around a gallon or so just before the last cool down, and was planning, if empty to pull the top feeders and put on the shallow super quilt boxes today or tomorrow. When I took off the cover (only looked at one hive) I noticed a blue/green mold forming on the top of the inner cover-should this be a concern and require a wash off with bleach while it's still warm? It looked like they finished off about half of the last syrup load and the feeder was loaded with bees. The down side of the top feeders is that the bees are up in the top with little incentive to go back into the deeps. I was hoping they had finished it and it would be a clean pull the top feeder and drop on the quilt boxes. Also, I have wrapped the hives with 1" pink foam around the sides and with the top feeders on, just put a sheet over the top cover, planning that when I put the quilt boxes on, that would be put away. Are my hives too warm and that's why the mold is developing or are the bees making blue cheese during their off season? Any guidance on this?