My blind is tracking to one side.

All you need is masking tape to fix this one.

A

Unroll your blind all the way down, until you see the bare aluminium tube.
B

Cut a 5 cm strip of masking tape and stick it onto the aluminium tube, on the side you need the blind to go to. Roll your blind back up to check if it tracks straight.
C

Add a couple more layers of masking tape for thickness, until the blind rolls up straight.

If this doesn't fix the problem, please contact us.