OK, what screen protector from the factory?? When I got the phone, it had the customery "Don't Text and Drive" plastic protector, but that was it. There was no screen protector in the box, nor one on the X10 either. I have the US version which I think is the X10a. Are your across the pond and have the X10i? I also think the X10i came with an 8GB microSD, where as the X10a came with a 2GB microSD (Yes, thanks AT&T). So please clarify if you can, Thanks!
The screen is "Scratch Resistent" and Glass, so you must not be taken proper precautions. Yes, you need to pamper these Smartphones, or you'll see your hard earned $$$ disappear real quick. I have had mine for 3 weeks and have no protector and no scratchs. Yeah, I baby my X10 and keep it in the case unless I'm home.
Also, Monster makes a 'Screen Cleaner" for the high end Flat Screen LCD's for the home. I have for example the Mitsubishi 60" and I use the cleaner on it. Well when you use the cleaner on the hone, it places a protective coating on it and you will notice the screen is slick, meaning very smooth.... I highly recommend it..