I give up on Dual Extrusion thanks to heat creep

I have tried very hard for the last week or two to get a successful Dual Extrusion print. Unfortunately, heat creep has consistently clogged my nozzles from about 30 minutes to 2h into a print.

I’ve tried everything I can think of to avoid it – Retraction set to 0 or to 50mm on nozzle switch, idle temperatures as low at 50 degrees. I’ve got constant airflow through my garage, the enclosure door is wide open. I’ve tried different filaments, printing them at the bottom or top of their temperature range. No matter what I try, the filament jams.

I give up. If I keep trying, I’m going to jam my nozzle permanently. The hot end screw was overtightened in the factory and I’m unable to remove the heat block to extract curled filament buried inside.

I’m so disappointed. After waiting since August for this machine, it sucks that I’m still unable to use breakaway / PVA to support my prints. Back to cura tree supports for now… I really hope that Snapmaker is able to find a solution to this problem.