Minimal volume one sleepbud, random charging issue other

[QC-Kiwi]

I'm currently on my second set of sleepbuds and have now hit some new issues.

The volume on the left sleepbud is minimal and I can now hardly hear it even with the volume on maximum.

For the right, this seems to charge to a random value despite being charged for well over 12 hours each day with the last few nights being 75%, 15%, 48% (the infamous 48%), 1% and 78%.

Troubleshooting to date:

• Both have been well cleaned multiple times, with no obvious impact to block sound transmission (I can clearly see there is nothing blocking the sound transmission)
• I've carefully cleaned the charging contacts on the case plus the contacts on the sleepbuds
• I'm on the currently latest version of the case updater, case firmware and IOS app
• I've reset the case multiple times
• I've tried multiple combinations of the above over multiple nights

Any other suggestions? Other than get another exchange set?

When this product works, I love it, but the multiple failings are severely annoying and I'd now be unlikely to consider purchasing other Bose products (although I do love my QC35 headphones).

[QC-Kiwi]

I've now received my second replacement set of Sleepbuds after this latest issue, with Bose Support in Australia arranging the replacement, complete with a new two year warranty.

Fingers crossed they will last more than a couple of months this time.