Ok so I had a bush steamer and that just leaked out water so I took it back and exchanged it for the shark pocket steamer I've only had it a few days and today I tried it out but when less water was in there was a popping noise coming from tank so I decided to empty it and refill it. I let it heat up for awhile and pressed the trigger I couldn't hear the steam generating and it made popping noises then let out steam I was wondering is this normal or has it happened to anyone else? Thanks