Beginner's question - curling up scarf

[knittedbrows]

Hello all,

My one and only knitting project so far has been a striped football scarf. It came out quite well except that it curled up from the long edges so it made itself into a long snake shape. I washed it and tried stretching it out, but it stubbornly always rolled back up.

Can anyone suggest how I can avoid this happening again ?

Many thanks,

Rick.