Prusa MK3S weird 'Blobs' on PLA print surface This is the first time I've run into this problem and it seems very confusing. I wanted to print a simple functional part out of PLA and although the first few layers were fine, the 6th/7th layer started to have some weird 'blobs'/deformations on it. I don't know how to fix it and the problem didn't go away after changing the filament. I suppose the problem is related either to my settings or the printer. It is very weird, I fully calibrated the printer right after the first fail. 

Settings:


nozzle 215&nbsp;&deg;C
bed 60&nbsp;&deg;C
speed 100, 50&nbsp;mm/s for bridges
cooling 100&nbsp;%, but no autocooling in order to print faster
using PrusaSlicer


Photo:
After hours of trying to fix the problem by trial and error I found that getting the nozzle slightly higher by approximately 0.1&nbsp;mm was the solution. I cleaned the rods from dust, tightened most of the screws again and calibrated the printer. 

I don't encounter this problem anymore even while printing at 150&nbsp;mm/s speeds.