Help!!

I got my mini last monday and did like a benchie and then 4x big prints(2x spool) and the scraper. Now suddenly it makes a mess off every 3 print. Things i triend: -lowering speed -differant brand of filament(esun and bambulab) (who did both print fine 2 days ago) -I tried new never opened filament from the plastic(bambulab) -Lowering speed What can i do?