On the clean, you want to make sure that that bar touches your thighs at the jumping position (roughly the mid-thigh), so when we teach it - and you can always do this when you're when you're practicing this on your own - we go slow at first because we have to learn to touch that point on the thighs every single time. Eventually, it will be quick, and in fact, eventually it must be quick since a heavy clean or snatch won’t be successful if it’s slow, but the lift needs to be correct before it’s quick. As a result, if you're missing that point on the thighs, simply tell yourself to slow down, and when you get to that point on your thighs, that’s when you speed up. Again, in reality, the entire lift should be speeding up, but if you’re working to correct something, slowing down can be very useful.
Hopefully, this helps you in your training, and as always, we hope this helps you get stronger and live better.