Decreasing parasitic clutch/drivetrain drag

My bike is already set on a really low gear, and when I pedal, it seems like it's awfully tough to push the bike when the clutch is disengaged.

Are there any tricks for fixing this? I've fiddled with the clutch but it doesn't seem to make much of a difference. Would replacing the spring with a better one help?

Yeah, I've been riding this bike for a while now. It seems to me like it got more drag as time went on. I've used a good amount of grease on all moving parts so I don't think that's an issue.

I'm going to try adjusting the slack on the cable and I think I'm going to try getting a stronger spring just to see if it makes any difference.

Yeah, I have adjusted the flower nut plenty of times. If your clutch ever slips too much, I once took the pads out and soaked them in iso alcohol and detergent. Let 'em try and put them back in and that pretty much solved it. I think some of the grease I used got in there so that's why it started slipping.

The flower nut is actually pretty easy to adjust, but they never go over that in the chinee instructions. After you take out the small stopper screw, you have to hold in the clutch lever and keep it in while you try to turn the flower nut. You can usually do it with your fingers, but if not, I usually use a screwdriver(turning the nut by pushing the little grooves).