Buy them when you buy a vacuum cleaner - yes they are quite expensive - but each of them lasts 6-9 months - so in terms of usage costs even not so expensive. The reason I suggest buying these when purchasing a vacuum cleaner is that, as I have found out the hard way, if you don't buy additional things to go with the product when you originally bought this product, you're not buying it can later if you need them.
Dawn Professional Detergent Regular Gallon
3 Review
๐ฐ InVade Drain Gallon by Rockwell IBDC128
3 Review
๐งผ Powerful Alconox Detergent Cleaning Concentrate Container for Effective Cleaning
3 Review
๐ก๏ธ Enhance and Safeguard Countertops and Surfaces with StoneTech Revitalizer Protector
3 Review