Reviving Old Carpets: Tips

Hey everyone, I've got some old carpets that are seriously showing their age. They've got all sorts of wear and tear—faded spots, some stains, and they just look kinda drab overall. I’ve tried a few things on my own, but nothing seems to really bring them back to life. Anyone got tips or tricks for reviving old carpets? Maybe a service or a method that actually works? I’m looking for something that'll really make a difference.