I concur...
I'm going to try and say this without coming off as an @$$...here goes....
:headbang: STOP!! QUIT!! NO MORE.......
Look, three completely different snakes have now lost their lives in three completely different scenario's way too closely to each other. This should be a sign that something is being done wrong on the keepers' part, not the snake's or the store that you bought them from. I am not saying quit the herp hobby completely, but I think it's time that you quit and take a minute to do a little more research on what it is exactly that you are trying to accomplish before any more animals have to depend on you for their well-being. I'm all for you pursuing a hobby that I'm sure you love, but you need to put their lives' before your wants.
Their is an abundance of great information available for you to learn from, if only you'll take a second to absorb it. Try asking questions about your setups first, before putting the animal in it, for example. You might also consider finding snake/herp-specific websites for whatever animal you are keeping and inquire there, as opposed to asking corn-keepers about other species. We are all here to help, so please let us before any more animals lose their lives.