Thank you, makes sense that thermistor might show lower values. I've tried to print with anything between 180 and 225 and it worked well with PLA every time.

I've checked the hot end, and it's all tight. Also, leveled the bed with the sheet of slightly thicker paper. Should I use something really thin?

Haven't yet calibrated the extruder, will probably get to it later, after I finally finish printing spare parts for the extruder