you could try using a product called Boundary, I haven't used it but I've heard good things about it. Petsmart sells it, it basically has a scent or something that tells your dog not to go wherever you spray it. And if the spots are not thoroughly cleaned up Lucky will think it is ok to go there again
Baloo was the same about pooing on the pads until we put half of the pad into an old box and the other half onto the carpet or linoleum. The box would be on its side so it had a top to cover him. For some reason he's really shy about going poop in the open, he likes to hide, even when we're outside he'll go under the bushes! lol...Eventually we moved the pads out of the box and put his pad in the corner of his x-pen...another weird thing he likes going in corners.
Do you also have the pads that have a scent that makes the dog want to go on them? I think I have Jump Start or Rapid Start, I can't remember.
I hope things get better for you and Lucky
