Hi Michelle,        How long are you drying your slides? We have found
that you need to  leave the slides in a 37 degree oven overnight and then
in a 90 to 100 degree  )C of course) for another hour.        If this
doesn't work, there are some red frosted slides that our IHC  people use
that I have used for LFBs also and those seem to work.        Good luck and
let me know how you do.