Both the sat water ice cubes would freeze due to the temperature of the freezer.
The tea was no longer hot or (brewed) so the 5th didn’t dissolve like the others because the tea was hot or warm enough anymore it cooled down. So the sugar won’t dissolve no more.
Overuse of the same chemicals can result in the pest becoming immune to the pesticides.
I think the answer is
Reduce friction
:)