Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Coating delaminating from glass

I purchased a 52mm Hoya Pro Digital filter and a 58mm Pro Digital filter about 8 months ago. These have seen little use, have not been exposed to the elements and have only been cleaned using professional lens cleaners and micro-fiber cloths.I was inspecting and cleaning filters today and both of the Hoya Pro filters have the coatings delaminating from the glass. I saw absolutely no problems with my B&W; or the Marumi filters. They have all been exposed to the same environments and cleaning techniques. I have used Hoya filters for many years but never again.