Use a pumice stone, like the ones used to clean toilet bowls, on sweaters with fuzz and cotton clumps. Obviously you would use a new toilet pumice stone to clear the fuzz from clothing or you can buy small bricks of pumice at the hardware store. All you need to do is drag or scrape the stone across the clumps of fuzz and presto they should be gone! Avoid using shaving razors for this job because they can cut away at the threads that are intact. Using a cheap pumice stone can save you money from buying a "sweater fuzz remover".