I am excited to announce that I have launched Westinghouse Studios, a multiplatform transit photography odyssey. Click on the photo below to see this great new website and to follow its Instagram page.
This should give you help on how to clean a DSLR's lens:
http://lifehacker.com/241856/how-to-clean-your-dslr-camera-lens
http://www.kenrockwell.com/tech/cleaning.htm