-1- You can completely grease the thread after buying it.-2- When resetting it is important to note that it is slow and that the resetter is placed in such a way that it does not know where it is or that it is as deep as possible in the caliper.-3- Please take it back slowly and slowly as the brake fluid takes time and will not suddenly be pushed back no matter how much force you use.-4- Please also ensure that you unscrew the cover of the brake fluid reservoir so that no pressure can build up in the reservoir when you reset it.