It is easy to use
old jars for making your mixes in, whether it is an old peanut
butter jar or a jar that held spaghetti sauce. And running
them through the dishwasher doesn't get them totally clean
because of how the mouths of most jars are much smaller than
the inside of the jar.
Fill the jar half
way with vinegar. Then add a squirt of dish soap and fill
the rest of the way with hot water. Allow to sit 15 minutes
then using a bottle brush, give it a quick scrub (any particles
left on the jar will come right off). Rinse well with hot
water. You can then put it through the dishwasher on sterilize
setting to sterilize the jars.
Make sure the jars
are completely dry before you put any of your Mix
in a Jar recipes into it. Any moisture will cause the
contents to spoil.