What you need:
1 tbsp of cornstarch
4 tbsp of water
1 tbsp of rubbing alcohol
small measuring glass, cup, bowl...whatever.
a small spray bottle (shown in first picture)
Mix it all together, pour it into your spray bottle and shake it up!
Spray in on your scalp, in your hair and anywhere the your hair needs to be de-greased. You do not need to drench your scalp, just dampen it up.
Run a comb or your fingers through your hair to distribute it evenly.
Let it air dry or quickly blast your scalp with a hair dryer, which is my favorite method. We are going for speed here.
Repeat if necessary.