I'm using this solution posted 28 April 2019 by HonestOpinion (scroll down to that post).
It sets wah as a footswitch that engages at your current volume.
Thanks Smashcraft!!!
I had just ordered a new switch, then saw your electronic spray cleaner suggestion. A quick run to store, a few well placed sprays and 'voila' it's working like a champ!!!
thanks again!!!