When I bottle, I take all my bottles that I am going to use and put them in the dishwasher that I have in the beer cave, just a small amount of soap, and about a 1/4 cup of distilled vinegar. When the wash is done, I pull them out and tin foil the tops, of close the flip tops closed.
The easiest way to take care of bottles, is to rinse them out immediately after emptying them. This way they do not dry out and get moldy, or collect any trash etc.
No matter how much money you THINK you are saving by brewing beer, you are still just pissing money away