Hello,
I successfully tested two methods against deers, both of them well. Spreading leftover coffee grounds and human urine. It dont needs to be applied on the plants it self, just around the beds or in the corners.
Two years ago,my neighbour lost almost all vegetables in one night. I didn’t. I regularly spread coffee grounds when available.
I’m femal, I don’t have a necessary tool, but I collect urine in a bottle. Just a little bit works great. Very easy and for free. No deers more.