I always give mine a soft blow before using before using and after refilling. That way I never get juice in my mouth. Man the whole time typing this I was trying to word it with out someone making a gay joke out of this.I had that issue with some RY4 carts. Gave them a quick blow, and they were good to go. It's a good idea to bring it up for quality control issues, to see if something can be done about it re: the factory. But the same issue happens with 3 piece models sometimes. Liquid can sometimes shift during flight.
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