Good day!! I recently had someone tell me I should only be re-using my 650 ml bottles 4 or 5 times before I trash them. I built my supply by drinking the beer of commercially sold beers and cleaning the bottles out. I've been using some of my bottles for years. I check them each round for cracks, chips, and wear and toss any that look damaged or don't come clean. Otherwise they go back into the stack to be re-filled. Is this true or a "brewers myth"? Should I be putting a date on my bottles and counting how many times I am using them?