No, but I also don't let juice just drain out of my devices. Honestly what do you expect? If you bath your device in liquid, liquid is going to make it anywhere it can. I am not being mean, but I just personally can't visualize a scenario where juice not only leaks onto my device enough to be bothersome without me taking the tank of trying to fix it or figure when and why it was leaking. But also leaking enough that even if it was outside the device enough for it to leave the top and roll down the side of the device.
That's not to say that the experience with this device is great. I mean mine has been pretty good, but its been because I have been pretty lucky not to need most of the more quirky points of the device. Nothing defective but just silly habits (well maybe the lack of TCR 4 and 5), and that can be disheartening specially when one of the quirks (TCR in F instead of C) is going to be resolved in another device half its price.
But I mean if juice is making it under your 510, through the screw holes, or some crack somewhere, and flowing enough to come out the bottom. I am not sure that points to a problem in design of the device.