I have a philosophy on clearing negative energies. I believe that one should only use external objects in severe situations, but in such a case there is an amazing recipe I made for an essential oil.
All of the following are oils, except for the last
and crystallized camphor
Mix them together in a vial or something that is airtight
Use enough of each so that you can smell the individual scents...
then put a little camphor into the mixture... shake (close first!) and the camphor should dissolve.
It is useful for putting in a hot bath, or you could wear it (i don't... it is a feminine smell)
The purposes of each ingredient are as follows:
Sage - protection and neutralizing of negative energies
Cinnamon - acidic to neutralize negative energies
Rose - a divine, yet earthly love
Vanilla - empowers you to love your surroundings
Peppermint - balances and grounds
Camphor - a powerful negative-energy neutralizer