I would clean them or replace...you can find OEM cleaned/"refurbed" ones, all four for like $100 on ebay.
these were mine, which i pulled a few months ago because my car would not start. The injectors were completely clogged and no fuel could get through:
If you replace the injectors, make sure you clean out the whole rail.... I'd also suggest pulling out your fuel pump assembly and replacing that sock filter. You might be surprised at what your tank looks like inside...this was mine:
When my friends cleaned mine up a bit they sprayed them with carb cleaner and compressed air, but i eventually went with just replacing them. Never tried to put the old ones back in. I was in a hurry moving to another state so i didn't have much time to mess around with things