Harmonica heating and valve glue problem

[@madhusudanbhandarkar]

Good advice. I don't think it applies to South india where there is no winter except Bangalore.

[@doordarshisingh]

Not only in winters but the valve sticking problem arises during high humidity also

[@madhusudanbhandarkar]

@doordarshisingh since I am not an expert about the utility of valves in the harmonica, can you please enlighten me