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Thorough hand washing is typically recommended. But use of hand sanitizers is promoted, too. However, a recent study found that staff in long-term care facilities who relied too much on hand sanitizers over hand washing actually reported more outbreaks of norovirus-related illness.
I realize this is taking the evaporation example to the extreme, but it illustrates the point. In the end, if you think that you should be using hand sanitizer, you're probably better off buying a small quantity of hand sanitizer and using it. If it is expired by 1 day, NBD, but if it was a year old, you should just head out to the store and pick some up. Caveat: I may be completely wrong.