I have never had any luck with squirrel as bait. Seems like every grinner around can find it. Urine on a dirt hole usually means it has been robbed. I am not saying you won't catch one on it. Also mix your sets up, don't use the same bait on all 6. Keep track of each set and see what works best. Sometimes you just have to be creative. You might want to switch to some gland lure instead. Be careful with your scent too. Good luck!