should glass scratch easy on apple watch 3 stainless steel

Hi

The sapphire crystal on stainless steel Apple Watch models is more scratch resistant than Ion-X Glass, but it is not scratch-proof.

If the screen appears to be scratched, then it is possible that you have only scratched through the fingerprint-resistant, oil repellent coating. It is normal for this coating to wear away under normal use, but it may have become scratched without damaging the screen beneath.

Unless the issue is due to a manufacturing defect, cosmetic damage - including scratches - is not covered under either Apple's Limited Warranty or AppleCare+.

Apple does not offer a screen repair or screen replacement service for Apple Watch and Apple Watch is not user-serviceable. The watch may instead be eligible for whole unit replacement via chargeable, out-of-warranty service.

I suggest that you contact Apple Support (mail-in service may be available, if required), make a Genius Bar reservation or visit an Apple Authorised Service Provider with a view to having your watch inspected and to establish any available service options, likely timescales and cost:

• US: Apple Watch Service Answer Center - Apple Support
• Elsewhere: Select your country for Apple Watch service and repair information

Note that, whether you have scratched the screen or not, Apple does not recommend using cleaning products or polishing or buffing the watch with abrasives; these will wear away the coating and may also (further) scratch the display.

A good quality screen protector (of the thin film type) may be effective in obscuring or reducing the visibility of the mark, as well as in providing some measure of protection against future damage.