Looking at the before and after, I would think you got them good enough. Might go through and clean all of them now, guaranteed the rest are all in the same condition. ideally pull the relays and hit the terminals with electronic cleaner once or twice a year to try and keep the corrosion and nastiness at bay. Electronic cleaner is similar to brake cleaner in that the power it comes out of the can provides a cleaning effect to some degree. Just like the spray of brake cleaner works loose dirt when it hits it.