I just pull it off along with any feathers quick and easy, just yank them out and then there will be no more problems in the future. sure they give a little squak, but doing all that washing and stuff takes forever and makes more of a mess than you might figure. I prefer less feathers in the rear area for health and sanitary reasons not to mention it helps with fertility. But I am sure those with named pet chickens would prefer the whole giving it a warm scented bubble bath and a cup of tea afterwards treatment LOl it's all good whichever way you decide is best. keep her vent area treated with a salve or bag balm to prevent this from happening again and make sure she is drinking, dehydration is the main cause for cluster butt.
HEY who couldnt use a warm scented bubble bath and a cup o tea?! (Now we should have thought of THAT the day before yesterday).... this helps me a bit, have this issue going on with my Roo and one of my hens..... Am glad it seems like its no big deal....