I use this http://www.overclockers.co.uk/showproduct.php?prodid=OA-001-AK&groupid=701&catid=57&subcat=27 it's very good and lasts ages with a nice smell of citrus.
Ditto, great stuff. Remember to scrape the excess off before you apply it though. Agreed, I think I've had the bottle I've got upstairs for about 2 years now and there's still some left. Well worth the spend.