WELL AS STEPHANIE SAID IN THE 4TH BOOK THEY DONT HAVE TO SHOWER.AFTER THEY ARE DONE HUNTING THOUGH I WOULD IMAGINE SOME OF THE VAMPS WOULD GET DIRTY.IDK.TRY TO ASK STEPHANIE
Well I assume they shower, wouldnt they be awfully dirty after hunting? But perhaps she just didnt want to go into such a mundane thing with the Cullens. "And then Edward headed up to shower after a long hunt, rinsing the blood and grime from his body." I see how its appealing to us, but Stephenie probably didnt think that little detail mattered so much haha.