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# How do you account for mostly my subscribers watching on the first few hours/days?

Alternate Question: Is there a set number of days after posting that you guys would recommend to start a new thumbnail test?  
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If you find that your click-through rate is way higher the first few days, we recommend adding a 3-day delay to your test to ensure you’re running with the least bias possible. This should get around any big CTR spikes and ensure a true test of each thumbnail.