@CraigInTheCorn
I'd take the ispindel out of the petling. Turn it off and remove the battery. GIve the whole thing a really good clean with some isopropyl alcohol on a soft toothbrush. Dry it thoroughly with a hairdryer set on low, then recharge and have another go.
My one that sank might have done better as the electronics were all at the top, the newer designs have components lower in the petling that would get much wetter.
As mentioned above Oring has worked for me I use a tiny bit of lubricant on the top of the petling and on the oring and tighten it up slowly.
I'd love to find a way to have a fully sealed design, just need to find glass blower with an interest in beer, cordless charging and switching wouldn't be a problem.