Skin Irritation from Powerbeats Pro

I developed a severe reaction approx 3 months (below) after delivery direct from Apple. It has taken me a further 9 months, to pinpoint (sanitising, healing, over ear headphones purchased) that it was the PowerBeats Pros that was causing the issue (as I’ve had earlier versions of wireless Beats for years with no problem). Within 20 minutes in the garden or a little longer if sitting at a desk, I get the same itch and discharge. On reflection I can only think that it’s the sweat coating that others mention. I’m sore let disappointed due to the sound quality, controls and battery life of the PBP as they are now rendered useless to me, I wish I had come to the Forum first before the pain and suffering..