HRM connection issues

Posting this here cos I thought it would be something people here would have experience with.
I've got a wahoo tickr and I'm having major consistency issues with it, keeps sticking on a number or dropping out entirely.
My first strap broke (connector stud snapped), tried it on an old garmin strap with no consistent connection, nor on a cheap amazon strap, so I got another Wahoo one. Which had been working OK-ish till the last week or so.
I've traced it to a connection problem because if I wet two fingers and press them against the studs on the unit itself the LEDs light up as they should.
Anyone got any tips to keep the connection working? I've been following the wahoo recommendations for cleaning the connectors etc but it's not helping much. And made sure new battery etc. etc..
I'm loathe to buy another because I have only had this for 14 months and I've had 2 Garmin ones previously that died completely.
I've got a wahoo tickr and I'm having major consistency issues with it, keeps sticking on a number or dropping out entirely.
My first strap broke (connector stud snapped), tried it on an old garmin strap with no consistent connection, nor on a cheap amazon strap, so I got another Wahoo one. Which had been working OK-ish till the last week or so.
I've traced it to a connection problem because if I wet two fingers and press them against the studs on the unit itself the LEDs light up as they should.
Anyone got any tips to keep the connection working? I've been following the wahoo recommendations for cleaning the connectors etc but it's not helping much. And made sure new battery etc. etc..
I'm loathe to buy another because I have only had this for 14 months and I've had 2 Garmin ones previously that died completely.
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Trek 830 Mountain Track frame turned into a gravel bike - for anywhere & everywhere
I also tried changing the battery again and using all my other straps.
I've come to the conclusion that it is f*cked again and HRMs need to be treated as essentially disposable items with a 12-24 month life.
Has anyone tried using the Tri versions? They don't look too much more expensive and could be a bit more robust (since you can swim in them).
£20 these days https://www.amazon.co.uk/gp/product/B01M8QD9Z4
2020 Voodoo Marasa
2017 Cube Attain GTC Pro Disc 2016
2016 Voodoo Wazoo