As a biochemist by training I can say that there is nothing sterile in a the vast majority of situations, even less so in a household. The oven, or a pressure cooker will be sterile for a few minutes unless sealed while still hot, a bit like canning. I argued this point with my wife when our children were very small. When I trained students on sterile technique, or handling radioactive isotopes I used to use food colouring to indicate how microbes transfer from anything to anything touching. And on top I'd remind them that their breath, clothing and hair is not sterile either.
Even a skilled technician can't achieve anywhere near 100% sterile technique in a standard biology lab. 100% sterile technique needs glove boxes, UV light sterilisation and a bunch of other equipment on top of highly trained professionals, the stuff you see in films for handling haemorrhagic fever etc. I am overkilling it consciously, the point is there is little need to worry as long as you aim to be reasonably clean, no jar, tobacco, or paper towel is sterile, EVER.
I wash everything food related when I buy it, and dry in the strainer. That includes jars I've repurposed to store tobacco. It's mostly to wash away dust from sitting on an IKEA shelf, or any sort of residue from the manufacturing process. That's all!
