Yep, keep kneeding it in a ball then flattening out the surface to a somewhat clean area. It may be discolored but that will be ok to use. If you have a large enough piece of contamination in there, pick it out completely or trash the clay piece and get another one.

You can use any quick detailer for the most part or a mix of shampoo and water. Generally speaking (referring to the post below yours) spray waxes are not good clay lubricants. There are many variations of "quick detailers".

- Ones with lots of cleaning power (which I like for clay use)
- Gloss enhancing quick detailers with no protection
- Carnauba based quick detailers for minimal protection and a wet look
- Polymer based quick detailers for more protection and a slick surface

Hope this helps.

George @ Detailed Image