Is controller drift worth learning to repair when the controller still mostly works?

My main controller has developed a tiny leftward opinion. In menus, the selection sometimes moves by itself. In games, my character occasionally walks out from cover with the confidence of someone who has not been invited to make decisions.

The problem is intermittent. I can play for an hour without noticing it, then spend ten minutes correcting it. Increasing the dead zone helps, but in games that need small movements the controls start to feel muddy. I cleaned around the stick carefully and tested the controller on two devices. The same movement appears on both, so I am reasonably sure this is not one game behaving strangely.

A replacement would cost around $70. That is affordable, but the rest of the controller is fine. The buttons still feel good, the battery lasts, and it fits my hands better than a cheaper spare I own. Throwing it into a drawer over one drifting stick feels wasteful.

Repair videos divide into two genres. In one, a calm person opens the controller, cleans or replaces a small part, and reassembles it before lunch. In the other, someone loses a spring, tears a cable, and discovers soldering as a surprise final boss. I have repaired a laptop fan and replaced phone batteries in the past, but every device seems easy in a video where the person already knows where the clips are.

There is also a middle option: pay a local shop. The estimates I have seen are low enough to consider but high enough that a new controller starts whispering from the next column of the spreadsheet. I would gladly pay for a durable fix. I do not want to pay half the price of replacement for three quiet weeks.

How would you decide among adjustment, cleaning, professional repair, and replacement? I am not asking for a model-specific teardown. I want a decision process: which tests confirm the fault, what questions to ask a repair shop, and what failure rate makes continued tinkering a false economy? I like learning repairs. I like finishing a game more.