Hi there. Solution as follows: Push the stalk down when you want the intermittent wiper to kick in (so the wipers wipe once), and then immediately push the stalk back up in to standard position. Then when you push the stalk back down into the intermittant position the wipers will wipe after that length of time, and continue in that time pattern, thereby allowing you to set the variable speed on the wiper. It's a good feature - just takes a while to get the hang of it.