I'm using starter cells made of recycled paper (like the cup carriers you get at coffee shops or fast foods restaurants). I had no problems last year with the exact same product. However, I noticed today that there's white hairy mold on the sides of the cells. I have them in trays but I had the lids off after seeing just a few clumps of the same mold on the surface of a few cells. Underneath is much harder to keep dry than the surface. Any suggestions? I don't want to loose 100 starts (2 trays with 5 10-cell starters each) to a mold outbreak. Is there anything garden safe that will kill this white mold?