You will be given a definition of a task first, then some input of the task.
Given the background description of some cooking related query, summarize the question into a title

I bought a hand crank can opener (Oxo) because of the good online feedback and only use the "shake" dry approach. It quickly developed rust in between the metal. If I invest the time and scrub, I can remove most of the rust.When I initially posed the maintenance question in IRC concerning rust and utensils and kitchenware in general, I got suggestions from "spend a little on a decent one" to "you want stainless steel". I stored both answers as helpful for future purchases.Just recently I noticed two can openers in the office pantry that both show rust. Obviously these were neglected and showed more corrosion. After seeing this, I am curious if rust is actually normal and harmless. Are there more expensive stainless steel can openers that are rust resistant? Should I be drying more rigorously? I just thought of another possibility: should I keep the can opener in a jar of cooking oil?
Output:
What is the proper way to maintain a can opener?