I'm using a diamond tipped nozzle, 0.4mm. I understand that smaller nozzles like 0.2 don't play well with filaments filled with solid materials, and the glow stuff suspended in this is indeed a solid material.

Temperature may be an issue, but I wouldn't know. I print PLA typically at 230° C, including this filament, which I am certain many people will find jowl-flabberingly appalling but that's what I do. My machine goes pretty fast and I found that gives me the best results.

Going to a larger nozzle and kicking it up a bit on temp is going to solve a lot of the problems.

Slowing it down and reducing retraction will also provide some help but not as much.

Side note- use a hardened nozzle (micro Swiss is inexpensive for the occasional abrasive, but they’ll still wear, just slower. Diamond/ruby nozzles won’t wear nearly as much, or, at all but are expensive.) this won’t stop clogging, but it’ll wreck the normal brass nozzles and throw off your flow settings.

Probably at least one