Of course. Bottles, teats and caps should be carefully washed to remove food and milk residues from bottles and teats. Disinfection alone is not enough. It is important to wash the product thoroughly in order to remove all impurities that may be trapped in the bottle. You should clean baby bottles, nipples or other feeding equipment in hot, soapy as soon as possible. Use a clean bottle brush to clean bottles ( this brush only for cleaning bottles), and a small teat brush to clean the inside of teats. After that, you can put them into the steam sterilizer.