Take an old knife (not serrated, i made that mistake) and scrape off as much fletching and glue as u can. Once u get it as clean as u can, take some accetone and whipe the shaft off. Dont use regular store alcohol because things like that have petroleum in them and leave behind some oil. Be careful when scraping carbons cause u can scrape the carbon layers off in some cases or if there camo shafts, u can take off the finish.