B.F.
N.,
I had the same problem with my son. What worked for us was using the Kandoo wipes and hand soap. My son loved having his own "Big Boy Bathroom" stuff and it looks fun. I pointed it out a couple of times at the store before buying it until he got to the point that he really wanted the Kandoo stuff. Then we took a special trip to buy it, but the only way we would get it is if he would wipe his own bottom. When we got home, we made a big production of getting rid of the baby wipes (which didn't get used on him, but rather by me as make-up removers, but it made him feel good) and setting out his stuff in his bathroom. He only asked me to come in and do it once afterwards but I told him that if I did it, then we would have to get rid of all of his big boy stuff - he didn't want that!
That was 6 months ago and we have been good ever since.
Hope that helps.
B.