Can you unscrew or detach the front lens? You should be able to do this.

Get some eyeglass Zeiss cleaning tissues from Wal Mart, and clean it, very gently. Brush it off first with a clean camel hair brush.

If it is fogged BETWEEN the lens then it must go back to Tasco.

This is a VERY small diameter telescope. The same size as a pair of 10x50mm binoculars. You would have a better view of the sky with the binoculars.

http://www.handgunrepairshop.com/tasco.htm Warranty service