Didn’t know how useful it would be. As it turns out, very. Lint on clothes almost gone after the very first use. Our clothes used to always have layers of lint after washing and it used to stick and would be difficult to get off. Couldn’t figure out the problem although had cleaned machine with vinegar and baking soda many times. This worked really well. After first cycle, lint on clothes almost gone. I think if used once a month would be great. Value for money. Perfect purchase