I am assuming that you bought a call with an acrylic or poly tone board. Honestly, all calls WILL stick. But acyrilic ones are the worst about it, poly second and lastly wood.
First try to practice minimizing the amount of saliva that you put into the call. PRACTICE is all I can say about that one.
Secondly, the reason a reed sticks is due to moisture and the amount of contact between the reed and the tone board. This is caused by your hot air being blown into a call that is colder than that air, which causes condensation. To help MINIMIZE this, try keeping the call in your pocket, or keep them inside the upper area of your jacket by unzipping it a little.
Lastly, if this is a high end call you may want to send it back to the mfg and have the tone board worked to make sure something hasn`t warped or that the area that the reed and tone board touch is properly adjusted.
Hope this helps
STUMP