It's particularly hard to use the thermometer correctly if your baby is under three months. Her ear canals are likely to be too small. But if your baby is older, here's how to use an ear thermometer: Don't use a strip-type thermometer, which you hold on your baby's forehead, to check your baby's temperature.
For medium rare on a 1 inch top sirloin boneless steak, total cooking time should be about 8 to 10 minutes. For a 2 inch boneless top sirloin total cooking time of about 18 minutes will give medium rare results. Ideally, you should be using a great instant-read meat thermometer.
Grill your top sirloin for 6 to 10 minutes per side, or until it reaches your desired degree of doneness. If you're more concerned with even cooking than with pretty grill marks, turn the steaks every minute or so for the corresponding 12 to 20 minutes total cooking time.