Ok, I've just about had it with this. My deadlift is suffering because my hands can't keep a hold on the bar. I'd love to be able to do this without straps. I can't use chalk/powder, because when I work out, it's the same time all the PT's are working out (and we're the only ones in the weight area)

What exercises can I do to increase grip strength? I really want to depend on straps as little as possible.

What I have access to are barbells (with as much weight as I'll ever need), dumbells up to 100 pounds (which I have no issues holding on to) and various machines designed for other exercises.

Please help me not depend on straps!!