Pinshield, I love the look of your products my friend and would love to buy a bunch for my machines, but you can't expect people to buy brand new products from you and then when they get them, they have to buy cleaners and clean them multiple times to hopefully stop a well known residue issue with the material.
IMHO, you as the creator and seller either need to do the washing of each protector yourself, then test them to make sure the residue is completely gone and then sell them to people, or you have to find another product supplier that has a material that doesn't leave that residue and use those guys. Otherwise it's not fair to your customers to have to do all that work to a new product to make it usable.
I'd really love to order 10 of these from you my friend, but can't do all that cleaning to each protector, hoping it stops the known residue issue.
I'll be keeping an eye out for your products, in the hopes that this issue gets resolved. Please feel free to PM (Private Message) me any time if you do in fact get the issue resolved.
Thank you and best of luck to you my friend.