Weird characters in title if it contain “ ”

The Solution is:

every normal character stored in weird starts with &# ends with ; like this ٪

So you can simply
1-open you dreamweaver

2- new HTML file

3- code tab

4- delete all the code in it

5- put one weird code like this ٪

6- design tab

7- you can see the original character here

8- execute this sql query in PHPMyAdmin:

update en_posts set post_title = replace(post_title, 'one weird chracter code', 'original character');

9- repeat this method for every character

10- save your sql queries in txt file

11- execute all this queries every few days

The benefits of this cleaning method:

1- for big wordpress installation this will decrease your database size & speed up your site performance

2- if you using getposts or wp query posts to execute posts by s=keyword all the weird posts will not shows in your query

this is very fine at least for me