How do I remove sticky bushes that keep coming back every year?
Removing Sticky Bushes
Basically there are two approaches, digging, and herbicide. It can be really hard to get every piece of root when you dig, which is why many people prefer an herbicide that kills the whole plant, leaves and roots. This article tells you more about the kinds of herbicide from which to choose: https://www.gardeningknowhow.com/plant-problems/weeds/conventional-weed-killers.htm
However, it also occurs to me, because you said sticky bushes, that you might be referring to the sticky quality of the bushes. If that's the case, your bushes, or possibly the trees above them, are infested with sucking insects that are dropping sticky honeydew. If you kill the insects, you can wash the sticky away with soap and water. This article will tell you more about these pests: https://www.gardeningknowhow.com/garden-how-to/info/what-is-honeydew.htm