What happens when I let something boil over?

An essential basic part of the PITT cooking system is the windproof: the round piece on which the grate rests.  This part is multifunctional: not only does it draw the heat of the flames upward but it also serves as a catch tray.  Thanks to the large diameter of the burners most of a boil over and/or spatter will land on the heat shield.  It is easy to clean with a cloth.