I ff DS and stopped sterilising when he was 7 monts old as i couldn't see thepoint to it. When i did sterilise i used to wash in hot soapy water the sterilise in the microwave, then fill them with cooled boiled water and sit them on the bench til i needed them. DS has never ever been sick, and i actually think sterilising might well be a waste of time as they are only sterile til you pull them out of the steriliser.

I think you need to do wahatever makes you feel comfortable and if thats sterilising and keeping your bottles in the fridge, then do that.