How can i fix bed wobble?

That is not wobble I see, it is pressing down on the bed in the front.// This is a consequence of the design of the printer, you are only supported on the back edge so the front is pressed down when the extrude is being placed in that position.

 

if you push on the corners of the bed (when not printing) does the bed move? If so raise the side that moves until it doensn't. Relevel your bed. its possible its tweaked enough where you are lifting one corner (or corners). I've been able to fix it by a proper leveling. having 4 adjusters instead of 3 does not help this situation.