I can't say much for dogs, however Dusty has had a tear stained eye for years. I was told by the vet to use plain Saline Solution to rinse the eye out, and to use peroxide on a Q-tip to clean the stains. She doesn't have an eye infection (although if I don't keep it cleaned it can become one), the vet said it was a partially blocked tear duct. Being that she's a cat and the surgery is difficult for them being small, and her age, we've opted to not do surgery.
However you do need to be careful with those commercial 'eye cleansers/wipes'. We got some once that had been recommended by a friend, and Dusty got a bad eye infection from using them, and no I didn't get them in her eye. Ended up that I wasted money on the fancy cleanser, and then had to spend extra $$ on eye meds! So now I'm leary of those type of products and don't use them. The peroxide and saline solution seem to work fine.
Good luck
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