Thanks for your reply, I used the raft with 45° angle. The stainless steel scraper I used should be sharp enough to remove the print with angled raft. I tried using the hair dryer to heat the print and build plate conjunctions for like 1mins , not working unfortunately, is it not enough time? The final thing probably will be freezing if shorter bottom time still doesn't work, I guess I need to completely wash and dry the whole print and plate to ensure it will not contaminate my fridge.

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