Put grout sealer on tile and it ran and streaked the tile what do you do?

If you have a Dremel with a very fine grit attachment, you can buff the tile with it. I would test the attachment on an inconspicuous place first to make sure it does not damage the tile. Good luck!

Good advice!, and as you try to buff the surface to restore the original appearance you may want to consider valve grinding compound available at auto supply places. Look at the sealer you used and if it cautions not to expose that product to metals or glass --- Throw It Out! Then use the correct sealing product. Buy one that gives a 15 year warranty for waterproofing and doesn't etch a tile surface.