@Nickolai,
Thank you, I can confirm as I had same experience. Most website recommend a build plate temperature of 70 degrees and till now I always used this temperature. But on my latest project (an large RC plane with thin walls) I had a lot of warping and I’ve spilled 1kg of PLA on it and a lot of time. I’ve lowered the build plate temperature to 30 degrees and now the print is finally ok. I think it’s because I currently print larger opjects so the nozzle needs to travel a longer distance.
Edit; unfortunatly the problem still persist. It starts warping and pulls even the brim from the build plate. Fan is off as well ;-(
Edit2; I think I’ve found it 
Recalibrated the Z-height using piece of paper (even the first layer looked perfect) but instead of using 0.1mm difference I’ve used 0.15 (tenth of a mm) to get closer to the build plate and now it seems like it’s sticking nice and not warping anymore. Still using a brim and temperature of the build plate a bit higher to 50 degrees. Temperature of the PLA is 190 degrees and I’m using a glass build plate and to stick hairspray.
