Right it sounds that you ought to be looking to attend the projected club meet !!
My first question is ' Do you have air conditioning ' ? If you do turning that on for a couple of minutes will clear your screen.
Depending on which model BMax you have there is a button near the top of your control panel which directs air to the screen; on my Titanium it is one of 3 buttons one above the other; and is the top button. This should clear your screen as well; in severe cases you could also turn off the air distribution to the face and feet.
I can only guess you have the Studio model without a/c, heated windscreen and some of the options that help you with this problem. Please let us know which model you have.