In the past I have used Martin Fields Screen protectors for my Sony Clié. They are great but costs a fortune and so applying them is a nerve racking business. I fitted my first one badly and thought I would put up with it for a while. However every time I looked at my device, or when i was showing other people I would have to apologise for the crappy screen protector.

So it lasted a few days before I snapped and put the second one on, this time it went on perfectly and was hard to tell if there was even a protector on.

Moving to the N900 I bought a pack of cheap protectors from ebay as Martin Fields do not make one for the n900 yet. The first one went on badly and looked awful. I took it off immediately as it costs pence and the 2nd one went on perfectly and IMHO is as good as the MF one.

So I think I will stick with the cheapies and at that price I can replace them monthly and the screen will always look as new

So I think you have to replace the one you have, it is already bugging you or else you would not have posted