Mine was not wireless but I don't see that it would make any difference.
We have excess key boards laying around anyway so I gave it a try. I took it out before the dry cycle started and put it on a patio table and let it dry in the sun.
I am using it now and it's just fine It's a Dell key board that came with the comp.
Thanks! Mine's a Dell too. I think I'll hold off on washing it though. It's expensive and difficult to get replacements in my small town (just in case it doesn't work). Either have to order it over the Internet or wait til I go to 'town' to get a replacement and even then it's close to $80.00.