I’ve also found that most filaments have a temp range. I use to just print whatever it said on the spool. I use a lot of Polar Filament PLA and the range is 205-225. I print my first layer at 215 and drop it to 210 for the rest. I haven’t had any stringing since I did that. Also, a heat gun will get rid of strings pretty quick. I got one from harbor freight for like 14 bucks. Its a learning experience. I feel like after about a year I finally have a better handle on it.