You are using contact treatments on a pest that is present only at night.
If you want to get up at twelve, three and five and spray your plants you
can get rid of the thrips. It is easier to spray the plants with a soak
that gets the insects in the mix, such as Malathion, Bayer's insect
spray. Repeat at weekly intervals for three weeks. That ought to get rid
of the pests. 
Tom 

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