Casio W-800h Mod Fix -

Using the wrong type of oil can degrade the rubber gaskets or damage the plastic components over time.

However, this is a high-risk, high-reward modification. Done incorrectly, it will ruin the movement, create unsightly bubbles, or cause leaks that could damage the watch beyond repair. It also requires a complete and careful cleaning to prevent any particulates from floating into the display. Because the process significantly complicates future battery changes, it's best performed on watches with a very fresh battery. casio w-800h mod

Engaging in hardware modification carries significant risks that every hobbyist should consider: Using the wrong type of oil can degrade