The quick answer is "No" -- but with one or two exceptions as below.
Most consumers ask if they clean our polishing cloths such as item 118 (Sterling Silver Shine Cloth)
or item 9617 
. Again, the answer is no, they should not be washed. It removes the special cleaning ingredients. However, we do have two cloth selections that can be washed.
The first is untreated microfiber cloth, such as item 7808
. It is used to clean fingerprints and dust from items as diverse as computer monitors, eyeglasses, binoculars, or even fashion jewelry. You may wash this cloth, but we do suggest that if you use it to clean jewelry do not then use the same unwashed cloth to clean your glasses.The other item is our traditional presentation cloth
. This cloth is used to present soft stones, jewels, or precious jewelry to consumers in a retail store environment. As it is made of a special type of 100% cotton, it is soft and can be used over and over again. It is perfectly acceptable to wash this cloth. To summarize, if a Blitz cloth you use is a "polishing cloth" do not wash it. You will remove all of the ingredients. If your cloth is untreated, and the instructions specifically say that it is approved for washing, then you can wash it.
