How frequently do you dry them with a dryer?
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The HA seller did not suggest a dryer was necessary, so I don’t have one.
These are rechargeable Lumity HAs. The body of the HA is a totally sealed unit, so I guess a dryer would not provide any benefit for the electronic stuff inside the sealed unit.
Thanks @JordanK I looked up that manual yesterday! Unfortunately hard reboot did not resolve the problem 
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If you want reliability with hearing aids, use a good quality dryer.
OK, that’s a KEEPER! I had no idea there was a “hard reset” protocol! I just turned in one pair of my Lumity Life aids cuz the RIGHT one simply went DEAD on me. But oddly, that aid’s BTE unit could still be turned ON (green light on) or OFF (red light on). I’d have tried a hard reset before dropping them at the audis!
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I have the same aids. The receiver/speaker end would benefit from drying, but yes, I’ve also wondered how a so-called hermetically sealed BTE unit would have issues with moisture… 
The challenge we face with rechargeable aids is WHEN to put them in a dryer/UV unit. I have TWO pairs of Lumity Life aids, which I wear on ODD and EVEN days. I tried putting them in a dryer overnight, then back in the charger as I’d be wearing the other pair, but it’s a hassle.
If Phonak wanted to make MORE money, they’d come out with a charging station that has UV/drying capability for the Life rechargeables.
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Funny how MY pair of Lumity Life aids also failed at 16 mos just 2 days ago! The RIGHT aid simply went dead. So now they are going back to Phonak. Like you, no apparent reason or cause at all. I was streaming TV via Roger ON iN like I do every night.
I think that just cuz we bought the aids 15-16 mos ago, doesn’t mean they aren’t actually 3+ years old! They sit on a shelf till sold. So maybe it was time to have the BTE battery unit replaced.
What if you DISCONNECT aids from BT on phone. Then turn aids off and BT off on your phone. Then uninstall the phone app. Then download and re-install the phone app. Then reboot phone, turn BT on and let it “find” the aids from “available devices”. Then pair + connect to phone.
Let us know if that works. There seems some inherent issue either with malfunctioning aids, OS version on your cell phone, squirrelly phone app, incompatibility with that app, BT and other apps on your phone. It’s a credit assignment prob.
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Yeah, all those weird things are explained by debris caught under the rocker button.
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I had Phonak B90’s for 5 years and had 3 sets of receivers. I think that’s normal and the receivers are cheap and easy to replace. It is a wear and tear item.
My L90’s are almost a year old and no problems yet.
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OK, that makes me feel better about my receiver issues. But imagine Phonak wanting $150 bucks PER receiver? Seems steep.
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They are sold much cheaper online, so it’s not Phonak selling them for $150.
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That’s your fitter/audiologist hiking the price up…
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Yeah, should be under $50 a piece unless you get activent.
WH
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do both hearing aids have this problem or one only? I had problems with the left HA, they exchanged the cable for the microphone - transmitter, this worked.
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My problem caused by the left aid, as mentioned earlier in this thread. Right is working okay.
Good to know cables can be exchanged. But the problem with my aid is not the cable, it’s the switch and/or internal electronics. My faulty left aid has to be sent to Phonak for repair/replacement.
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I asked what I believe is least-expensive HA provider in my area - $180 to replace both receivers (simple open domes) on my Lumity HAs - ouch!
Right now it’s just a hypothetical question for me, in case I cannot resist jumping into the pool with my “waterproof” Lumity HAs. I wish I could do that!
I know they won’t survive… thanks to @1Bluejay for testing 
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Update on OP question. My faulty Left HA was sent to Phonak. It has been replaced under warranty, no explanation about exactly what was wrong. So far so good.
I don’t think Phonak would open a sealed HA ‘bean’ and fiddle with tiny bits inside and then re-seal it. So presumably this a brand new device, not a repair of the original. It is not programmed.
Audi that sent in my damaged aid is different to aud company where I purchased. Naturally this audi does not have my previous HA program.
This audi could start new programming from scratch, but costly (they did not get the profit of selling the HA) and they have no available appointments for weeks.
I will take a deep breath and see if my minimal DIY ability lets me restore the previous programs…more later
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I belong to the club of Lumity HAs failing after just 15 months, too. 
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Welcome @DamonHill to the bad-luck-Phonak club!
At keast we might learn something by sharing our disappointing experiences with new-ish HAs. Can you tell us what went wrong with yours?