Not so far David but I've only been using the jacket for 3 months or so. I wash it down with fresh water every now & again & give the zips a light spray with WD40 or similar. So far so good!By the way - any problems with the metal zips on your Snowbee - My first waders were Snowbee neoprenes - lasted 4 years - pretty good I thought.
If you are thinking of the Snowbee, getting lure boxes that will fit in the front pockets is a pain in the arris. I've gone for the B.A.S.S individual lure boxes
Just seen where you live...........how much plugging do you get done in Streatham lol?!