I sterilised my bottles after every use however I’ve seen a hack that if you pump put the pump in the fridge after the use like you would a bottle and it should stay good for a few days like breast milk would I saw a YouTube video of people doing this and it make sense like when you leave the breast milk for 4 days in fridge x
Washed pump parts with soapy water along side the bottles but then sterilised the bottles using the milton cold water method, also only washed the pump once a day, stored them in the fridge after every use then washed before bed and left to air dry for the next day
Always sterilised my bottles after every use and pump parts once a day
If I ever use bottles I always sterilise them too after using Milton soap to remove milk residue