When I had shutdown my startup, I had to remove the resources from AWS which produced ~$1000/mo. I removed those and followed the same practices as the parent d

When I had shutdown my startup, I had to remove the resources from AWS which produced ~$1000/mo. I removed those and followed the same practices as the parent did along with regular Any.do alerts to ensure I didn't miss anything. In subsequent months I found that, there was something or the other which came up in charges, like a CloudWatch Alarm, Log somewhere. It took a while to remove all of them to bring a zero bill. I'm not complaining that it's something nefarious on AWS part, I'm saying it's designed in a way such that someone using various services of it can easily loose track of billing. Yes, I could have closed the account altogether; but I didn't want to. Now I wonder, if AWS starts charging for the billing alerts itself whether I would catch it before I actually receive a billing alert for the billing alerts.