Hi guys...im still studying on how to sterilize bottle as far as i learn right now there are 2 method to sterilize glass bottle that is boiling it in thewater and the other method heat in oven..currently im using boiling method but somehow i saw some of my sauce got mold at the neck of the bottle and sauce become bad and smell..maybe it was my fault also because i did not know that we must fill the sauce untill the neck of the bottle and i didnt flip it upside down after fill it hot.next time i will try this method..also i already buy pH meter i check my pH of sauce is 5.1 so i know right now that my sauce is not acidic enough to combat bacteria...so next time i will make sure i follow the step that ive learn..but the question is that my method is correct??or theres anything more that i need to know to make sure my sauce are well preserve..thanks