i personal use Esun Cleaning filament , but for the purpose it is designed for and that is for cleaning out clogs instead of collor
the reason why is because it is even more clear filament then petg , it just get real glassy and when it cools down it becomes back white
it does handle temperatures of 300 degree just fine, but it wont help at all with flushing colors
it just does not stick at all, so that cause it to clean out any clogs/debrees that is left in the nozzle as it can not stick to it and it get pushed out instead causing a clog
but for a color change you get color bleeding because small parts keeps sticking to your other color filament , then the cleaning filament wont even perform as you like ( as it does not stick )
if i am not wrong , after i used the cleaning filament i even got color bleed when the cleaning filament has none ( makes kinda sense if you think about it )
then this will rise a new question, what is cleaning filament and where is it used for ?