I usually add three breathes after completing my circles to be sure harmful energies are blown away. A sage smudge is also an excellent cleansing method. I use garden sage, I grow myself. However it is a little pungent for some. Its smoke is somewhat milder.
Water is the universal cleanser.
Be careful of your source though. Just a few hours south of me is Mammoth Springs - the second largest fresh water spring in the world. Your local conservation agent could advise you on springs in your area. If you have to use tap water, allow the water to sit for a few days. You may try to charge your water, after clearing during a new moon.