I bought a used set of BVR Schuler filters to go with my newly acquired ST8XE. I have been using my ST403ME with BVI, but though a larger ship was worth investigating. I don't know much about filter cleaning and care. The B looks clean, The R has some crud that does not clean off with alcohol. The V looks fairly clean except around the margins, but has some spots that also resisted cleaning. Fact is: I don't know enough to evaluate whether these fliters are useable or can be salvaged with correct cleaning.
Is there anyone on the forum who might inspect these filters? I could send them with return postage for evaluation. I hate to invest in a new set if I can get these to work, but will if necessary.