Update:

Up until now I've printed with the heatbed set to 60 C. I turned it off, and was able to print at normal settings, 190C, 100% speed for two hours without clicking. Then the clicking started, I increased the temperature a bit, it stopped clicking but started again after a while. And after a bit longer it couldn't extrude at all again, filament started to bend instead of being fed into the extruder pipe. So I guess a clog built up somehow.