Stainless molds

[josthings]

I have a couple of stainless molds that I use Bullseye kiln wash on,  it took me a while to do it as evreyone said it was impossible and a pain etc.  I have not had any problem getting the kiln wash on and they have fired great, but I got two ready to use two weks ago and my student load made it impossible to do.  When I went to pick soe things up for tomorrows class I noticed that they had a brown mold (?) on them, now I live in Hawaii and it has been humid but this is something I have nevre seen before. The kiln wash was dry so I have no idea what caused it, any ideas?

 

I have never used the spray but just ordered some for the studio.

Jo