Removing strange chars from array (or string)

Hi Well, when parsing html page data I want to save is saved in txt file. But when saving in txt file I got some strange chars like small square (this I see when open in NotePad). When I try to open in WordPad this strange chars (squares) are recognized as new lines so in my file I got many empty lines. I've try to trim array (string) before saving to file but that didn't help (tried with trim, ltrim and rtrim). Am I missing something? Regards, Zoran