I have an extremely oily scalp that gets greasy if I skip washing my hair for even just one day. In the summer, if I wash my hair in the morning, it starts getting greasy by the afternoon. For those of you with similar issues, what shampoo do you use? I used to use Dentrol Grey and liked it, but the feel changed a lot after the renewal. Before the renewal, it felt like the oil was being washed away so thoroughly that my hair felt rough when rinsing, but after the renewal, it feels somehow softer. I like that my hair feels softer, but because of my scalp, I prefer a squeaky-clean feeling rather than just a soft wash. Are there any shampoos that wash as squeaky-clean as the pre-renewal Dentrol Grey? Please recommend a shampoo that is good for extremely oily hair.