Weight brush tool not working I was just following the blender guru tutorial on  level 2 part 1, and towards the end, he switches to the weight paint tool, my problem is that the paint draws toward the sides and the bottom only, but refuses to draw towards the top as seen in the picture

blender file:
Alright, so, in edit mode you've hidden some of the mesh, which causes the weight paint not to work:



Just unhide all the mesh in edit mode ALT+H and you can weight paint again :)