This instuctable is for people who
1 have a ds
2 cant use R or L
the reason the keys dont work is because there is dust in there.
Step 1: Firstu Need to Locate the R And/or L Button
they are on the top stupid!
Step 2: Next
put your lips around the key
MAKE SURE THERE IS A COMPLETE SEAL!!!
Step 3: Last
blow or suck air out/in the ds
Step 4: Finally
test it out if the keys still dont work try again.