I'll admit, in the beginning we were a little careless with the bowl inserts because we were so excited about the Wand. We learned some hard lessons witht he first couple of broken ones. Then we read all instructions and started taking better care of them. I'd say we lost the first 4 to human error, but total we've owned 12 bottomed borosilate bowl inserts, and of those 12, we're taking responsibility for about half. (yeah I'm throwing in 2 more than I think we broke to be SUPER fair) But what about the other 6 bowls? Well cared for, recently ordered, stored safely, cleaned well, but gently. We don't dab at high temps. The bowls are not being moved from heat to cold or anything like that. No creative improv trying to use it in weird ways. We've spent as much money on banger inserts as we have the whole Wand. I saw your little warranty card this last 2 orders... Does it even matter at this point? They're just going to break. I'm tired of searching chat boards and reviews and instructions for what I'm doing wrong and I don't want to guinnea pig it anymore. After these to inserts break I will have a used Wand available for cheap. I will miss it, but there's a HUGE design flaw here.