Hi, I'm no expert but I'll answer as it looks rare to get any replies.What temps' are you using? I have tried loads of different settings but find for me (Ender 5) I start printing at 60' bed and 210' nozzle for the first layer, then drop each to 55'/205'.I had quite a bit of faffing with the bed levelling, but found a few good print on ThingyVerse - thing:2987803 works well.Also are you using a slicer or printing direct from the downloaded file, I use Cura slicer (Free) first, this is where I can adjust the temps etc. really good free app.I hope this helps and I welcome anyone who may want to correct me, but doubt anyone will reply.Good luck.