Position yourself. Sit or squat over the stream so that the water hits the area you need to clean. You can continue to hover above the bidet or you can sit down on it. Note that most bidets don't have seats, but are still meant to be sat upon; you just sit directly on the rim. Some bidets do not have jets: they simply have a faucet that fills the basin, much as you would fill a sink basin. In this latter case, you'll need to use your hands to manually clean yourself.