It is important that you frequently test your smoke alarms. When you are testing your smoke alarm, there are a number of reasons why the alarm might not sound: 1  You may not be holding the test button down long enough. 2  Try holding it down for up to 10 seconds (20 seconds on photoelectric models) .3  Your battery may not be installed properly or snapped all the way in place.hen you are testing your smoke alarm, there are a number of reasons why the alarm might not sound: 1  You may not be holding the test button down long enough. 2  Try holding it down for up to 10 seconds (20 seconds on photoelectric models) . 3  Your battery may not be installed properly or snapped all the way in place.
When is the best time to take iron? In most cases, the best time to take iron supplements is about one hour before or two hours after meals. Iron supplements are best taken with water on an empty stomach. There is a long list of foods, such as coffee, tea or milk, which interfere with the absorption of ferrous iron.
Take-away: Calcium and magnesium may best be taken in the evening with food or before nighttime sleep. Since zinc should not be taken with calcium and apart from iron, it is most useful if taken earlier in the day either slightly before/after food. Iron should ideally be taken on an empty stomach and separately from other multivitamin/multimineral combinations.