if you can reach any of the frames, wet a finger and give the frame a rub, just to check if any of the paint or coating is coming off.
Do they have any vents in the top of the frames?
This can really catch you out
![Shocked :o](http://www.cleanitup.co.uk/smf/Smileys/classic/shocked.gif)
So instead of the expression, 'STAY AWAY FROM THE LIGHT!!'
STAY AWAY FROM THE VENTS!
![Grin ;D](http://www.cleanitup.co.uk/smf/Smileys/classic/grin.gif)
Also, depending on the type of seal between the glass and the frame, muck can gather here and make you look a fool
![Embarrassed :-[](http://www.cleanitup.co.uk/smf/Smileys/classic/embarrassed.gif)
Wash wash, rinse rinse, make awful swearing noises, mutter darkly about large hammers and extreme violence, and do it all again
![Angry >:(](http://www.cleanitup.co.uk/smf/Smileys/classic/angry.gif)
Once you have got it right, it all falls into place
![Wink ;)](http://www.cleanitup.co.uk/smf/Smileys/classic/wink.gif)
Unless the paint has oxidized of course
![Grin ;D](http://www.cleanitup.co.uk/smf/Smileys/classic/grin.gif)
Ian