Dry, wrinkly leaves on my orchid

[Happiness1967]

Hello everyone,
I am new to growing orchids. I have acquired a few as gifts (I do not know the type) two of the 4 have developed dry, wrinkly leaves like they are not getting enough water. The leaves on the other two look fine. The roots on all 4 look a bit weathered. Although, I read (on this site) that having green or red tips on the roots was good and the two with non weathered leaves have green tips. I water then in the sink about once a week and fertilize once a month with a bloom booster (I know now that this is not the best ) they sit on a South facing window and get about 3 to 4 hours of indirect sun. I am just at a loss as to what I should do. I did repot them (they were very root bound) about 6 months ago. I used clay orchid pots and bark for filling. Any help would be great. I am posting a picture of the worst one.