Deleting previous google searches

Does anyone know how to do this? The google searches I type are automatically coming up whenever I do E-bay searches. I would like to know if anyone knows how to purge out the old searches. I’ve tried deleting cookies, temp files, and history without any luck. Any suggestions?

Tools; Internet Options; Content; AutoComplete
This brings up a control that you can use to clear and then turn off the AutoComplete feature.
Assuming you are using IE, that is…

To get rid of individual entries, in the drop-down make sure the word is highlighted, then hit the delete key. Repeat for every word you want gone.

Thanks…that did the trick