That is spot-on what works for me. Warm soapy water has given me the best results with a PEI plate. The chamber heat soak is also big for these troublesome filaments. My printing gear lives in a closet and for trouble prints, I will crank up the bed, and my filament dryer for a half-hour or so to get reliable chamber temps.
Looks interesting. My primary focus is on engineering materials, but I’d love a truly biodegradable draft filament and I’m willing to put in a bit of time working out how to make it work with my equipment. Looking at Colorfabb’s site, it appears they only sell it in 750g spools which is incredibly frustrating considering my intended use. For a draft filament, the bigger the roll, the better!