Are you that there is not a chocolate hobnob crumb lodged in there..
You're not having much lick with the rodents, unkyUb.
I don't know how big the Hob-Nob crumb is,but I can assure you licking the mouse doesn't dislodge it.
The new set is working fine,and now have a spare set complete with Hob-Nob crumb.