I have this same pair, had them since the mid 90's, excellent, hard to find better glass.
Question, can I ask what it cost to have them cleaned and a check up?
I don't think I need it, but after about 20 years it wouldn't hurt.
As Brad said above it is free. I sent them in to Swarovski and they did all cleaning, ( inside and out); tightened up center hinge ( even though it did not really need it) ; and a bunch of other maintenance - all for free. Quote above in the listing for these was from them when they did it.
In fact, at the time I asked them about this service, they said everyone should send theirs ( any Swaro) in every few years- just for cleaning and maintenence. They said that and repairs is all covered under warranty. Mine did not have any problems and were in good shape- but they came back even better. Like factory new.