dirt in the trans.. what to do??

[project84300sd]

Ok last week I ordered a gasket and filter kit for my transmission... completely stripped the drain bolt (yes.. i was using the proper hex driver and WD-40).. ended up just taking the whole pan off while it was still full of fluid...

I ordered a new transmission pan and drain plug and finally got it today.. when I crawled back under the car I noticed dirt/dust sticking to the bottom of the exposed tranny... I know it was a bonehead move to leave the old pan off and the internals exposed until I got a new pan but now I dont know what to do...

I was thinking of spraying brake cleaner on a paper towel and gently wiping the dirt off the inside/bottom of the tranny.. letting it dry and then putting it back together.. what do you guys think??


Also.. my oil pan is concave in the center.. its not too bad (about 1/2inch in) but do you guys think I should go ahead and replace that as well?