higher temp, I think

[toddyburns]

Using Spectrum 96 glass, I was slumping perfectly at 1235, than I accidentally set the kiln to 1200 and noticed a huge difference – things were very softly slumped and not into the crevices. This actually worked well for a few molds and gave a completely different look. But you might try to raise temp 30 degrees and see what happens.