Info needed on cleaning the garden under the feeder (1 Viewer)

Hello all! Anyone know how I should clean the ground under my feeder. I am waiting to lay my new mulch until I know what to spray or sprinkle down to clean it out. I have a net but a lot of debris under it from before I bought the net. I was thinking of just shoveling out everything under throwing it in a contractor bag and putting new mulch down but I read something about garden cleanse powder to sprinkle. Not sure what that does exactly but I want to sanitize the ground if possible.
Any info would be greatly appreciated.

I personally would take a different approach and not use any products that need spraying or sprinkling. I would remove the top 2 inches or so of soil around the area I wanted to clean, maybe more if the ground was still "stinky". Then I'd replace the topsoil (or whatever is preferred in the location but definitely not gravel because it's be a nightmare to clean up)) with fresh. One could concrete around the base for easy future cleaning. The debris that I removed I would mix into the compost heap and once well rotted - put it on my veggies - yum