I noticed the channelling in my
DI and shaking helps but I rigged my
DI canister to be vertical instead of horizontal and I don't think it really needs to be shaken like that now.
Mostly it seems that the used beads tend to float more than the ones with capacity left. In horizontal position this creates layers and the water tends to flow easier through the upper used layer. When in vertical orientation and the water has to go through (mine flows bottom to top) it is forced to pass through the unused bead layer.
IMO vertical works much better. (Anyway I hope that is what you are talking about, I haven't gottne to listen to it yet!)
