They do, I've had to spray several times with citric acid and ISO. At this stage I've stopped spraying, things seem to be quite a bit better and I don't want to stress it anymore. Thanks!
Im currently 7 weeks into flower on my first grow too! Best thing you can do is learn as much as possible. ask questions and dont fall for all the bro science out there! Also make sure you have an IPM plan throughout the grow!