I have around 15 cobs and have been smoking 7-8 of them consistantly in my rotation for the last 1 1/2 years. (Prides and Diplomats, all natural and a Legend). I have never had even wet dottle let alone had the cob bottom get soggy.
Perhaps it's a difference in climates or perhaps type of tobacco or moisture content. I smoke mostly va/vapers but, even when smoking some aros (I had a bowl of BCA in a Diplomat yesterday) I don't have a a hint of moisture after a bowl. The burned ash just falls out of the bowl when tapped.
Possibly the mud will help with SBS (Soggy Bottom Syndrome). I've mudded 7-8 cobs and let the others do what comes naturally. The results seem the same (although I really like a nicely rounded bottom------that mudding gives)
Anyway, I've never tossed a cob or lost or damaged one for that matter. If I had a collection of meers or briars, with my luck, a giant tree would have already crashed through the roof and mashed the whole collection (and there are only two little, spindly trees on my 2 acres).