protected override void OnRemoved(View view)
{
base.OnRemoved(view);
aaPercentage.Focused += HandleFocus;
aaPercentage.Unfocused += HandleUnfocus;
ounces.Focused += HandleFocus;
ounces.Unfocused += HandleUnfocus;
boilTime.Focused += HandleFocus;
boilTime.Unfocused += HandleUnfocus;
hopLabel.RemoveBinding(Label.TextProperty);
aaPercentage.RemoveBinding(Entry.TextProperty);
ounces.RemoveBinding(Entry.TextProperty);
boilTime.RemoveBinding(Entry.TextProperty);
}