I was having a stringing problem. All of my filament is fed directly from a dehydrator and is kept at less than 10% RH. With COVID I could not get SUNLU PLA not PLA+ my preferred filament due to the rise in price. I got Esun and Hatchbox. I am printing a production part, so it is the same part in the same place over and over. Starting with Esun I got stringing at 215C I worked my way down to 185C and it was still there. I kept increasing my retraction until 6mm, still there. I flipped to Hatchbox and got the same results. I found a roll of SUNLU thinking it would solve my problem, but the same thing happened. I did this over the course of 45 pieces. I then stepped the hotend up to 225C positing that the retraction would work better hotter. It did, and stringing is gone. This runs counter to all that I have read on reducing stringing. I am printing out of the temp range of the filament. I am looking for insight and others real world experience.