How to make a new redirect for all users?

Question

htaccess

There is site A, it referred through htaccess 301 redirect to site B, but circumstances changed and the redirect became from A to another site C.
I look at the metric and understand that some users are still redirecting to site B, why? How to make absolutely all users go to site B? But one more condition: you cannot redirect from B to C. It is imperative that from A to C.
I don’t give the code 301, it is the most standard one. I hope I didn't confuse anyone)

Answer 1

config in the chair
And for especially maniacs, the domain is not a secret part of the site. Usually they pay money for this in Yandex direct, so that they know about its existence. So if you are afraid that we will see your domain, then immediately put on a tinfoil hat.