@Lfferro I'll see your messages quickest if you "tag" my name as you've noticed I've done for you with each reply. If you have specific questions, I'll do my best to answer however, you're questioning what I and others would perceive as accepted common sense; a bad connection becomes problematic, and easily rectified with adjustments. If you're inquiring about the metallurgic mechanics of thermal expansion impacted by temperature; heat increases vibrations of atoms in the metal. Similar to plastics; the kinetic energy of atoms will cause materials to expand or contract. In simplest terms, thermal stresses tend to cause metals to expand and plastics to shrink called the coefficient of thermal expansion. This is all very common knowledge and yet debating science doesn't help remedy your situation. I'm neither here to sell you on the benefits of caring for your old tracker's maintenance, nor explain the science of metals and plastics. I'm a tenured professional engineer with decades of global experience supporting multibillion-dollar technology companies, so perhaps this makes more sense to me than you, yet these simple basic steps outlined have helped countless individuals without anyone needing to debate molecular translational energies coefficient of thermal linear expansion and are happy just realizing that 'the parts adjust and these fixes readjust them preferably'. I'm seriously not here to debate or discuss laws of thermodynamics, I'm just trying to help collaborate with others to keep tracking towards greater fitness!
Keep it simple; better connections are more reliable. These antiquated out-of-maintenance trackers benefit from a little love and may provide more reliable usability. You seem to be grasping the rudimentary concepts of how/why this works, yet are choosing to not benefit from them without commentary, which although there isn't much in this thread, there certainly is throughout this forum, if you choose to peruse further. I'd suggest you simply try these fixes to [hopefully] enjoy some more reliable usability out of your Zip! 🤗
PS. a fun website you may enjoy learning from is called How Stuff Works. Highly recommended!
@JMCzipuser if you tag me in replies, I'll see posts sooner. I'm happy to learn these fixes are helping. The cardboard one very strange, and only tried it out of frustration, yet have since applied it to a dozen funky Fitbits! Yes, I've been encouraging users to check out the Inspire with the clip, you'll find this suggestion by clicking my name and seeing other posts. It's really the only current model to recommend to people looking for a non-wrist-worn tracker. The Inspires are beautifully designed trackers, yet, personally, not a fan, LOL
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