Namely, when you have just started to use a fresh pick (of the same variety, but unused, as opposed to a new "style" of pick).
It always seems to me that the "compensating" from the last one being worn, to the new one being perfect causes initial minor Fuxation for a short while till it's "broken in". It makes playing just slightly harder work for a while.
The ones I chuck away are worn but I'd bet some other players wear them out more than I do. Some use them till they break I think.
I tend to go to 3 or 4 "Carpet Sharpens" and then lob them or the change will be too drastic when I stat with a new 'un. It's usually around every 4 months I change em.
Anyone else get this "Compensation Fuxation" or tell us what "Pick Habits" have you got?