Proper storage in a hard-boxed case can extend the lifespan of glasses for many years, as opposed to a soft fabric bag or pouch.
CLEANING:
Everyday sweat, oil, dirt and makeup can accumulate on glasses, which can then transfer back to your skin on next wear.
To clean the glasses thoroughly, gently wipe surfaces with warm water, washing-up liquid and a lint-free cloth.
For a quick clean, use a microfibre lens cloth along with a lens cleaner spray or wipe, typically found in your glasses or sunglasses case, at purchases.
A small packet of glasses cleaner wipes can be convenient for travel.
MAINTENANCE:
Having a compact glasses repair kit can be convenient and readily bought on-line. It may contain micro-screwdrivers, various sizes of replacement screws and caps for glasses, spare plastic nose pads, tweezers and a cleaning cloth.
For quick fixes while out and about, a keychain micro-screwdriver can come in very useful.