Much will depend on where you live and the make of the razor.
In the UK for instance this site may be useful...
http://www.shavers.co.uk/shavermaintenance.php
There may be other places - I couldn't be bothered to do any more searching for you.
On YouTube there are videos that demonstrate razor maintenance like this one...
https://www.youtube.com/watch?v=rGD84BfKxAE
Ditto any more searching.
Good luck...
Peccavi, February 2013
