I use a towel/rag when that happens but it should peel off with the plastic, most of it.
If you add/sprinkle flake while stirrer is running...try and stop it add flake and turn back on, this may help with clean up time.
Hope this helps...
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Dels
1-5.25" 4 cavity stick mold...$55 tyd
2-5.5" drop shot mold...$30 each tyd or $50/pair tyd
1-4" slug mold...$25 tyd
1- 8 cavity fatty(fat ika) mold, new poured 2 times...$105 tyd
Bears
2-5" kodiak molds(beaver type)...$85/pair tyd...hand pour or inject
Basstackle
1-4.25" 4 cavity stick mold...$55 tyd
All molds are in great condition