I'm sorry to hear that. Issues like these can be quite frustrating...
In my case, the guys at Make Noise concluded that the unit was defective. The Gene Size control would not reach the bottom of its range without an external voltage patched.
If you have Maths, you can test for this specific defect by doing the following: Patch the Ch2 output of MATHS to the Gene Size input of MG, with nothing in the Ch2 input. Turn Gene Size all the way counter-clockwise, the Gene Size input attenuverter all the way counter-clockwise, and the MATHS Ch2 knob all the way clockwise.
In my case, this solved the problem. You can of course use other modules than Maths for this test.
I hope this will solve your problem, too.