If you have a Samsung robot vacuum cleaner, you must have at least one spare filter. Our vacuum cleaner only came with a filter. In a large house (requiring three sessions a day) with a dog, you will need to change the filter every day. Having one on the machine and one cleaned and ready for replacement is a quick and easy way to keep the machine running efficiently. I really wish Samsing had included two filters with the initial purchase, but I think it's a way to keep costs down.
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