What the heck is this? (pics inside)

[SimpleS14]

I have had this car for almost a year and I notice this weird grease spot on my left headlight. At first I just thought it was dirt, but no matter how many time I clean it off it comes right back. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/mad.gif" border="0" valign="absmiddle" alt=':angry:'>

I look at the car with the hood open and engine running (also reving) and I still can't figure out what it is and where its coming from. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/hmmm.gif" border="0" valign="absmiddle" alt=':hmmm:'>

Here are some pics:



This pic is kinda blurry


Does anyone know what the problem could be?

edit: retouch pics