I have a thing about trying to improve the clarity of my beer and have recently tried running a batch through a whole-home filter (5-micron) between two kegs. I'm sure the result would have been more clear if I had run it through the 1-micron filter as well. Here's where I need some help and advice. The first thing I noticed is that filtering seemed to affect head retention. Next I noticed that the tell-tale scum (typically left inside a finished glass) was missing. Neither one of these issues are necessarily bad. What I'm worried about is contamination if I ever decide to use the filter(s) again for another batch. Does anyone have experience with re-usable filters that can be safely autoclaved or sanitized? Buying new filters for each batch isn't worth it to me.