I'm so tired of having to replace the lenses on every Hydra 32HD and Hydra 64HD every 8-12 months. It is a shame. It is not water, nor salt creep, dirt, etc... It happens even using the lights at 80% peek. Always on the UV and Violet diodes.
Having said that, it would be a hit selling upgrade lenses that do not suffer from this issue. Perhaps made of a higher quality plastic, wider opening on every LED, or perhaps (not sure, just thinking out loud from my ignorance) made of pyrex glass. It is not only having to replace them, I assume that the amount of light that passes thru the lens will degrade gradually as they start to melt... so it is not just having to replace them, it is having degraded UV and violet for months.
@luxdium also has replacement lenses in the works.