I rinse the bottles etc., scrub everything down in hot water and baby detergent, rinse very thoroughly, put in the steriliser and add 200mls of water into the base (Avent one). 2 mins on high and done!
If travelling, I rinse the bottles etc., scrub everything down hot water/detergent, rinse very thoroughly, put into a solution of cold water and Milton and leave for (at least) 15 mins.