Rather than have mine sharpened over & over now I have a little 3 inch long rectangular sharpening stone for when I drop them or if they develop a problem. My ex got it, don't know where, but it came in a knife sharpening 'kit' with a cloth and some honing oil.
Today, don't know why, but all of a sudden the tips on one of my scissors wouldn't cut. Gave them a few swipes with the stone & we were back in business Before the stone I had a knife sharpener..a long round thing I found at a flea market & used that for a number of years. Look for a very fine smooth feeling stone rather than a course rough feeling stone. Also there are websites with some guidance on how to sharpen, but I just remember my Grandpa sharpening his knives & kinda imitate what I saw him do. A few swipes back and forth was all. My sharpener, Neil in San Diego, was surprised last time he was in because I had a couple of scissors sharpened. Every now and then I give them a professional 'tune-up'. Barbara