Thanks Marco, for your considered and full comments.

I'll reply more fully later, after I have recovered from a rather nice 2010 Grande Réserve de Gassac.



It is however reasuring to hear that you have, at times, experienced similar problems. I don't think it is a problem with my corkscrews, rather I agee with you: it more likely a case of a bad batch of corks.

I hadn't heard of "enzymic reaction" in corks; so I have learnt something new.

Thanks,

Cheers