The important feature about brainwashing is that it is done over and over again to achieve the desired goal. When people stop thinking independently for themselves, when they stop questioning their own personal sense of right and wrong, and when they refuse to listen to information that conflicts with their own beliefs… then they have been effectively brainwashed.
but if you find it too long they provide this great summary at the end.
1) Find lonely, desperate people
2) Break them down: Make them feel much worse about themselves
3) Build them back up: make them feel good about themselves again
4) Repeat 2-3 until their sense of self-worth is completely dependent on you
5) Reveal the “true” beliefs of the cult and take all their money
