Wordpress RSS feed Fix from post

Hi there.

I constantly getting errors on my RSS Feed - all referring back to characters used.

I mostly use "copy" and "paste" to create the post, and even tried the "word" option to remove funny characters, but still get these errors.

Only solution is to trace the post and either redo the text or remove it to get the broken RSS Feed working.

Sample of error:

This page contains the following errors:

error on line 6790 at column 72: Extra content at the end of the document
Below is a rendering of the page up to the first error.