OP, My comment above made me think on the methods I use and am going to suggest it to you. Stick the whole wire down. Not just the probe end but all of the wire where it is inside. I don't like the idea of a stuck wire loose and then stuck again my the door. I glue (no snake until it is cool... ;) ) the whole lenght of cord inside the enclosure down. When I was testing my set up the first time I could lift the weight of a twenty five gallon tank by my sample bit of cable (same type as a typical probe cable) until the cable broke the glue never let go. It must be secure. The other thing is I would recommend a failsafe if you don't already have one. If you have a new herpstat that is more debatable if it is needed but still I do not feel it is 100% not needed.