(1) You should take water in your right palm and put it into your nose in a way that the water reaches the roots of nostrils, and then you should rinse your nose with the finger of left hand, you should do it thrice using fresh water every time.
(2) You should make your both hands wet and then put it on the front part of head and pass both the palms along with fingers over to back of head, and then bring it to front. Then do the masah of the ears and put the smallest fingers into the ears, if there is a perfumed cotton etc in the ear you should take it out, and then wipe the neck with the back of the fingers. The details are available in Fatawa Shami, Alamgiri and in other books.
Allah (Subhana Wa Ta’ala) knows Best
Darul Uloom Deoband