When I turn on the Letus Extreme, the red button comes on but the motor does not start. Should I open up the Letus and try to figure out what's going on? If so, what should I look for and where do I open it? Is there a way to replace the motor? Also, by the way, I have been using triple AAA batteries. I now realize I should have used the larger batterires. Could that have been a factor in the malfunction? Thank you.