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So I discovered a trick with my firefly earlier this week. A little backstory first, I have a very hard time feeling if I am dehydrated. I just don't feel the usual stuff that people feel when they don't have enough hydration. One thing that always works is the skin pinch test. Given that I have my firefly in a relatively shallow placement in my hand, I noticed that the "lump" created by the implant is a bit more visible when I am actually low on fluids. Now its nothing major but its kind of neat to be able to just look at my hand and see what's going on. I did the pinch test a a few times over the week to see if it synced up with my observations and sure enough. This got me kind of curious to see if anyone else has any gimmicky perks that were not the original intent of their implant?