Place cucumber slices in jar along with dill, salt, and lemon juice (and apple juice if desired).
Bring water almost to a boil. Pour very hot water into jars until cucumbers are covered.
Screw lid on jar and place in refrigerator. (I always give the jar a gentle shake before placing in frig – just to make sure ingredients are mixed well.)
Wait at least 24 hours before serving. The pickles will taste even better after two days of marinating.