I have three VIRTUALS and have seen virtually no decline in performance from the initial lane shine level. FYI: I DO NOT LIKE HOW MUCH THE STRONGEST BALLS HOOK OUT OF THE BOX GENERALLY. The VIRTUALS lane shine somewhat after a few games but then have kept that reaction better than anything I've thrown. I no longer own any other of my sanded nuggets, other than one SPECIAL AGENT.
My maintenance is rubbing alcohol after every time I bowl. My strongest one I took down to 1,000 Ab and keep it there with 1,000 Ab as needed. I have occasionally used 4,000 Ab on the other ones.
People reporting any drastic loss of reax might be making the surface TOO ROUGH.