What is the inside diameter? I use a 1"ID (1 1/4" OD) clear hose which is the perfect size for the carboy neck.
To clean this one I put a piece of wire throught the hose, then tie it to my carboy brush and pull it back through. Hot water helps too.
Of course the best advice I can give too is that I always clean mine within minutes of removal from the primary.
Hope this helps.
Ready to Drink Bottles: AHS American Red - dry hopped w/goldings
Ready to Drink Bottles: AHS American Pale - dry hopped w/cascade
Bottle Conditioning: Goat Hill Bock
Bottle Conditioning: AHS Texas Blonde Ale - dry hopped with amarillo thus becoming "Amarillo Golden Ale"