> not recommended by the manufacturer or eye doctor

I never found a technical explanation of why you shouldn't reuse dailies after overnight cleaning. I looked at papers, manufacturers' websites, and spoke to two ophthalmologists.

Though not a safety issue, my own experience is that dailies are more fragile than long-term lenses. (Could this be deliberate?) They fit less comfortably after a week of reuse. Also, they sometimes develop a very tiny nick at the periphery after many days; when that happens you feel it the moment you put it in.

My rule of thumb is that I reuse dailies for 5 days--disinfecting each day of course--and throw them out. The ophthalmologists, who are friends and can speak freely with me, agree that my regimen is fine.