Some things I've noticed;
A. For the past 4 Sundays in the month of December, Chemtrails were heavy early in the morning and not so much in the afternoon.
B. There must be a "saturation rate" used to determine the amount of spraying
required to accumulate various levels of "haze".
C. The "wind factor" plays a huge part in the strategy used for spraying.
D. "They" are confident YOU WON'T NOTICE.