Mine has been decanned in a closed capsule for weeks and peaked at 10.5W on my Sanwu LPM today!
(I think you're correct @RedCowboy , it must have been dust that killed it)
G2 Lens, 25mm DTR module, 20cm distance, Sanwu Tracer 20T LPM, 0°C on TEC
Ignore the NUBM44-81 missing line, I haven't...