I wash nappies seperately - I just don't like the thought of wee and poo going through clothes even those they are getting washed! All of bubs clothes get washed with ours and DH's work clothes get done seperately. If you are worried I guess you need a HUGE stash so that you can do a wash every few days instead of each day Also remember the amount of water used to process and create disposables means if used sensibly cloth is well worth it! At the mo I do a wash every day to every day and a half. I want to increase my stash so that I am doing a wash every 2 days though.