With a dry clean head spray on some freeze spray and spread it all arounfd your bald head and let dry.It will take a minute or two.
With your head dry,put some GTBG glue(white in color) on your head and spread it all around your bald head.Let it dry but heres the trick,
just before it is fry put your hair unit on.When this is done correct its on like cement,for at least two days.When you shoer it will come off with no
chemicals,just good old water.Clean any glue of hair unit with water and thats it! This glue makes wearing hair so easy.
You could also do the sides and back with GTBG and use NextGen glue for the front if you had to,say jumping out of a small airplane that ran out of gas.
Play around with it,and one day you can post to another new guy,cycle of life.