I wear cheap synthetic boots because they're cheap and the brand I get fits my wide feet well. Still, I'd like to keep my new pair as long as possible. On my last pair, after being used and abused for quite a while, the material cracked/split open across the top of the foot (where the crease forms from walking). They were still otherwise wearable, but boots with holes in them aren't very good at keeping dirt out. So, is there any way I can keep this from happening in my new boots? I see a crease starting to form already after a half dozen wears, and the synthetic material seems to crease more sharply rather than making a big smooth dent like in real leather. Can I use some leather conditioner on them or something to keep the area supple so it won't crack?