Just a few weeks ago i notices Lil G's tube looked "loose". I checked the fluid in the tube and there wasnt' much. We had a spare so I decided to change it since i was leaving her with my parents for the weekend and me and hubby went out of town. SO... now just a couple weeks after i noticed again that her tube looked loose again. I refilled the water. Then later in the day i again checked to make sure her tube was ok. It was loose. It must have had a hole. At this point we didn't have another replacement. So i filled it again and taped it until it came the next day. Has anyone had this problem? What could be the reason why they are not lasting?