I spray my roses with a cocktail, but the problem is it hard to find a good sprayer. They work at first and even though I back flush them, they stop working. A week ago, I sprayed, but the level in the bottle did not go down. I don't know if it is completely clogged. So, I set it aside. Should I buy a new sprayer and re spray with the cocktail that is already mixed. Should I discard the cocktail and make new cocktail? If I discard where do I discard it? The bottles had you can use it again even after mixed with water, but that does not refer the cocktail. It is for fungal and insects like aphids and leaf miners such as rose slugs. Rose slugs and green worms that eat each leaf up.