former stainless steel mold

[Daisy]

I have been using Boron Nitride spray over a 6.5″ stainless steel mold I bought from Delphi.  I started out with 4 very light sprays waiting 5 min. between coats.  For the second and following uses, I spray once lightly, wait 5 minutes and it goes into the kiln.  I also tried the spray with a small stainless steel cone I bought at Sur La Table. but I’m having more trouble with glass sticking to the sides.  is there a secret to smaller molds not made specifically for fusing?