I once had a pair of real good quality, quite expensive leather brogues. I bought them thinking that they would last for donkey's years, but after just a year or so the leather cracked quite badly where it was flexing.
I'd been polishing them a couple of times a week thinking that I was really looking after them, but I was told by an old shoe maker that I'd used too much polish on them and "poisoned" the leather. Didn't know it was possible.
"When it rains, we get a little wet, and when the sun shines, we get a little hot"