I had a small leak, it was the AOS bellows. one time i replaced the rubber belllow, one time the clap was loose.
jacked up . and wheel off is easier, wheel on is doable. I was able to wiggle my arm up between the various suspension and feel the wet. and see it on my hand. hope this is the issue for you.
once you feel the bellow. you can wiggle a small camera , and snap some pics, thats what i did. every few months i have monitored via new pics to track any changes
