This damage causes severe under-extrusion, weak and stringy prints, loss of detail, and poor dimensional accuracy. To prevent this, you must upgrade the nozzle. Fiberglass offers remarkable strength-to-weight ratios, durability, and resistance to corrosion. However, it poses potential health risks like skin. The Toybuilderslab GITD PLA carries a warning that it is abrasive to nozzles and extruders (many others don't seem to carry such warning). Several forum threads also discuss this issue. The glow effect comes from phosphorescent particles in the material, usually strontium aluminate. After the light is turned. Due to it's ease of machining and very good thermal properties it's an ideal material for this application with an important downside. The phosphorescent materials integrated into the filament are often mineral-based powders which tend to be rough, abrasive. Glow in the dark filament doesn't look very special at first, looking like standard filament, but after absorbing enough light it will showcase its awesome abilities.
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