Just on this point. I bought a pair of sketchers just over a year ago and they recently started leaking. I contacted both sketchers and the retailer and now sketchers are not honouring the 2 year warranty! Sketchers UK claim that they never offer the 2 year waterproof warranty in the EU (only 1 year). It's only 2 years in the US!
Very disingenuous if you ask me. Warning to all. I only play once per week if even that and they gave way that quickly.
My wife and I both both bought similar shoes around the same time. I take as good care of my own as I think possible, dry them and store them inside but nothing more. My wife likes to keep hers in the car (not my favorite option but I keep my cart in the boot so who am I to complain), and hers have cracked after a year while mine seem perfect.
This doesn't prove anything of course, but proper care sure doesn't seem to hurt.