“Lint” can mean a few different things, so “how long’s lint?” depends on what you’re talking about. Most people asking this online mean either lint rollers, dryer lint, or software “linting.”

1. If you mean lint rollers

Disposable lint rollers last until you’ve used up all the sticky sheets, which is usually anywhere from a few days to a few months depending on size and how often you use them.

  • Standard rolls: often around 30–120 sheets per roll.
  • Heavy pet‑hair use: a roll can be gone in a few days to a couple of weeks.
  • Light/occasional use: a roll can last weeks or even a few months; bulk packs (like 5‑packs from big-box stores) can stretch close to a year for light users.

Reusable silicone‑style lint rollers can last years if you wash and care for them when they lose stickiness.

2. If you mean dryer lint

Dryer lint itself doesn’t really “expire” — it’s just tiny fibers your clothes shed over time. Your clothes slowly disintegrate into lint; frequent high‑heat drying makes them wear out faster, so you’ll see more lint and your garments will last less time.

So the better way to think about it is: your clothes last longer (and shed less lint) if you air‑dry or use low heat.

3. If you meant “lint” in software

In programming, lint (or a linter) is a tool that scans code for errors, style problems, or bad patterns. As long as the tool is installed in your project or editor, it “lasts” indefinitely — it just runs every time you invoke it or on every save.

Linters can:

  • Catch basic mistakes like undefined or unused variables.
  • Enforce formatting rules (spaces, brackets, etc.).
  • Sometimes auto‑fix style issues (like tools such as ESLint).

4. If you meant a brand or app called “Lint”

There’s also an app named Lint , which is a reading tool meant to help people read more and remember what they read. In that context “how long’s Lint” doesn’t really fit; it’s an ongoing service you use as long as the product exists and you keep an account.

5. Forum-style take

“How long’s lint?”

  • Clothes lint: basically forever… until you clean the filter.
  • Lint roller: from a few days to a few months, depending on sheets and how obsessive you are.
  • Code lint: lasts as long as you keep the linter in your toolchain.

If you had a specific one in mind (dryers, pets, code, or the app), tell me which and I can give a more direct, numbers‑based answer just for that.
Information gathered from public forums or data available on the internet and portrayed here.