I would like to have further clarification on this topic. I am a US citizen who goes in and out of the Schengen area regularly. For instance, 10 days each month, but every once in a while 30 consecutive days in Schengen. I have not stayed more than 90 total days during a 180 day period. Given that I do not reach 90, I understand there would be no need to have a waiting period to re-enter. I can continue to regularly come and go, as long as I watch out for the 90 days within a revolving 180. Is this correct?
Thanks for your help.