Fritz I use the scrape dripper that you can get at walmart.It comes by itself or you can get it with a 4oz bottle of activ scrape juice.I would get the one with the juice.The theory is that they only drip during the day via temperature change.When the temperature rises by more then 10 degrees then the bladder bag squeezes out a bit of juice.If the temperature does not rise more then 10 degrees on any given day no juice will be dispensed.

Now I have lots of trail cam picks of bucks working these scrapes but mostly at night.Even though they are supposed to get the buck to come out in daylight the way I see it,the pee smell does not go away at night,it is still there in the scrape and the deer smell it and check it out.Just during the day when it is being squeezed out it is fresher and should be more potent to a deer's nose.

I would say hang one over this bucks scrape or make a mock scrape and then within a couple days get in there and do some rattling and try to get his attention.If you have a buck decoy set it up near the scrape dripper.
Good luck...