Review on SUNLITE Black Thorn Resistant Tube with Schrader Valve by Rodney Gonzalez

I bought this hose to replace the original in the hope that the flat spike problem I was having won't come back. Before installing a new tube, they inspected and felt the entire tire for everything, inside and out. repetitions. repetitions. repetitions. Installed and inflated this hose. It was smooth in the morning. I reinstalled it after checking the tightness and checking the valve. It was smooth in the morning. Gave up and went to a bike shop where they put the tire under a fairly powerful magnifying glass and pulled out the tiny tip of the mandrel. Even without it, I could barely see it on my fingertip. He tried to find a leak in that pipe but couldn't. I checked the valve, it's ok. It just doesn't hold air. He was confused. I was confused. He put a regular tube in, that was all he had in my size and it's been fine for a couple of weeks. Still confused. But definitely not happy with this tube.