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I Can "Juice" my Leopard Gecko... WHY? - can i bath my leopard gecko

In recent months, our Leopard Gecko 2 occasions when they had become too great, looks very swollen. I told him a warm bath could help Lucas if superficial constipation, so I started it 2 times a day. Once when I was a danger of turning the water, get a better control over him and pressed a little clear water as the fluid from her back. Well, let's see if it would happen again, I have a gentle pressure, and of course, that the liquid is more or less clear pee'd it until it no longer occupied. So more or less "juice" for ... I thought it was better now, not much, some last 3 weeks, but I'm still swollen ... I waited about 3 days to see if it is outside its own system, which is still leftRepeat as above, put it in a warm bath for about 5 minutes and gave a slight pressure. In fact, the clear water like liquid out of his ass ... Can someone explain what to him? What are we doing wrong, because he kind of "hold" the water itself.