Can i house train my iguana?

I put a pad on the floor in the bathroom next to her lizard lounge; a cat tree for climbing in & out and her TV at the other end. I also put a large water dish on the pad. Every time she started the pre-poop ritual, I carried her to the pad (sometimes put her front feet in the water) and sat with her until she pooped. She was also an excellent observer of where I used bathroom. After only several weeks she would run down her cat tree and and come to the bathroom,(pause at the door), get on the pad ,poop, & wipe her tail. After this,she never went in her lounge again. I have also been able to house train my second iguana to go on a pad in the base under the lounge (privacy); and my third iguana will only go in the bathtub with warm water running (shower). He has been known to "hold it" all day, until he could get to his tub.