How can I get the smell of pasta sauce out of a Mason jar?

try soaking it in dish soap do that over night.

A little bleach in the dishwater always works wonders.

try 91%alcohol and some salt. put em in and shake the jar. i use this method to clean my bong.

With a little bleach and water.
You want to use 1 part bleach to 3 parts water, put the lid on and shake it. Then wash with warm soapy water.

Try sticking yer nose into the lids… Assuming you’ve washed out the jar thoroughly, me thinks, the odor is probably coming from the GASKETS in the jar’s lid. The oils from the pasta have penetrated (with the alcohol as a solvent) into the plastic/rubber gasket… The oils in the pasta are relatively light oils, so I would think that simply exposing the lids to warm air (like sunlit-warm air) would eventually carry away the odors after a day or two. Or, of course, just switch lids, if you need to use the jars right away.

(By the way, we had vodka/salmon pasta in Rome not far from the Collesium last fall, and it was ex-cell-ent.)

A little watered down bleach or washing it really good should do the trick. Glass is non-porous, so all you have to do is get the surface clean and you should stop the smell. Plastic however is porous so the smell absorbs directly into the plastic and you can’t completely get rid of it.

The gasket on the jar lide will probably still somewhat smell since the gasket portion is somwhat porous.