I play many instruments including, soprano sax, and clarinet.

I got this “Souvenir” eBay Duduk thing few days ago, and it’s been a struggle,
however, one should never stop so till i decide to get a new reed or a duduck from ethnictune.com, i have this question.

How to control the reed when it opens too much? I tried many reeds and all tend to give me the same result… they open too much. Opening the reed was so easy, but how should one control or limit the opening?