I am going to go a different route with this.....I am only offering this because i learned ALOT from the potty training experience. I would call myself blessed in this aspect because my then almost 3 yr old kind of did it herself with encouragement....I too had the issue with peeing in her panties and her pull up, and this is what happened.....Here it is.....He is 2 1/2 yrs old(not sure if he will be three soon), but anyhow....he should not be cleaning up a soiled mess! Period! Whether you are standing there or not! That is unsanitary, and foul! A child does not know the proper way to clean themselves....it is learned through the process....My daughter at the age of 2 1/2, peed off and on on the potty....I used pull ups, and encouraged her to potty often....A few weeks later, I put panties on her, and she peed within min in the panties.....This is what i said to her....keep in mind what i tell you afterwards....,"Ilena, wow you really made yourself wet....does that feel cold?????She said yes....I said, well it wont feel cold if you pee in the bowl......let me show you....so I sat her on the potty, and we sat there for twenty five min.....with crayons, and a coloring book, and when she peed....in the bowl.....she emotionally realized that she did not feel wet....she was sooooooo excited, and so was i......She never had an accident again...(Like I said....I feel lucky)!!!!!I still put pull ups on her at night(she wakes up either in the middle of the night to go potty or wakes up dry), cause i found that plastic panties do not always work....She has now been potty trained fully for 3 months! She goes all by herself, wipes herself, and washes and dries her hands....EVERYTHING.... And she just turned three! Be patient(I know you are from the sounds of your post), and again....dont push him...
Once they realize how great it feels, and when they are ready...they just do it.....dont rush it, just encourage it.....