What are some potential solutions to the following problems

What are some potential solutions to the following problems encountered when building and programming a robot using the Lego Mindstorm NXT kit?

1) Sensors not working

2) Wheels get dirty and don\'t turn

3) the program deleted itself (problems with the computer in the brick)

What are some possible ways the issues above can be solved?

Solution

1)

This suggest that the problem has to do with an app you\'ve downloaded. What safe mode does is to start the phone without loading any apps that you have downloaded.

Though i\'m not sure what 3:rd party app that could cause this. Try remembering what apps you installed around the time this started to happen. I suspect task killers or apps that integrate with the dialer.

2)