Your school probably charges you every time you get a new student ID. That should set a goal for you: Get that one student ID to last you all four years. The magnetic strip is the one thing that will face unavoidable wear-and-tear — but Lifehacker explains how to clean that sensitive strip, thus extending its life:

All you need is an eraser and a damp towel. Wipe the card clean with the towel to remove any grimey build up deposited onto your card from your wallets or card reader machines. It’s not something that gets extra dirty, but the small particles when compacted with continuous swiping/use can rub off the magnetic strip holding your card’s information.

Next take the eraser (we prefer Pink Pearl erasers, but the one on the end of a pencil will do just fine) and gently erase/rub the magnetic strip on the back. It will remove any gunk that’s built up over time. 

Doing that on a regular basis might make that thing keep into your alumni years — when you’ll still need it for the illegitimate student discounts. 

How long has your student ID lasted?