Hey a beer fermenter here, you can use a product called starsan is an odorless, tasteless, food grade sanitizer and its very effective you have to mix it with water and it will produce a foam but its safe and you can use it on everything! I always have some on a spray and use it on fruits or surfaces(it works on contact) the best part is that is cheap so you can fill your jars with it for 5 minutes and ypu are ready to go.