My FW4 has been doing some strange buzzes that I can't figure out. I turned it on and got 3 short buzzes. I clicked the button once for level 1 and got one short buzz but then got two short buzzes. I clicked it once again and received the one buzz confirmation, again followed by two short buzzes. I turned it off, removed/replaced the battery and then clicked it once after startup and it didn't give me two short buzzes. The next day it happened again! Then last night I got two short buzzes followed by a single short buzz. What do these buzzes mean?? Also, I bought some CBD slab and organic cotton. Can someone explain or link a video on how to use it with my FW4 by itself (not sandwiched between flower? What temp is best?