Washing My Hair

hey guys!

so ive been washing my hair everyday for a while now. however, ive heard thats its bad for my hair if i wash it everyday. the problem is, whenever i dont wash my hair it becomes extremely oily at the roots. ive tried dry shampoo and it works for a few hours, but after that my hair becomes noticeably greasy. i also use an oily shampoo/conditioner, but it is still only effective for a day. is there any way to make my hair less oily?

(i have thin, long hair and dandruff)