Instruct: Classify Amazon reviews into positive or negative sentiment
Query: most anoying vacuum ever

oh it's very easy to empty to canister, but what you might now know is that every 1 or 2 canisters you empty, you need to take the whole damn thing apart to change the other filters. this includes a sponge filter and others that you only clean with water, so now your vacuum is out out of order until that dries out.and also, when you have to do this cleaning, dust and dirt fly all over the place making a big mess which you of course can't clean up because you are waiting for the other filter to dry out.