Apologies for not being on for a few days. Thanks for all the suggestions. Kinky, thanks for the various links though you may have missed the bit about 'never shopping in Tiso again'
There is good news and not such good news.
Since melting the G-wax into the seams I am no longer getting wet socks! I can't even remember which forum I'd read it on! I wanted to be sure before coming back on.
However, as Phileas mentions, I still get a sensation of cold in the offending shoe suggesting maybe the water is still around? Tough to envisage the wax having sealed a hole in the liner? I've no idea - all I know is things are definitely better. I've even been stepping in puddles and through wet grass to fully exercise them.
I'm well pleased and the Meindls have been very comfy. The question is how long before it comes back and how often to repeat the process?