Every time I re-attach I am left with a gel like substance only in the very top of my crown. the total area covered by it is about 1 square inch, and it is over an area that is entirely french lace. This substance makes no visible difference, but acts like hairgel. If i run a comb through that area I will get comb shaped grooves. Here is my re-attachment routine.

Remove tape
Mirror slide tape clean as best as possible
fill clean sink with shampoo/water, swish unit around for 1 minute (pantene pro-v)
rinse sink and unit
fill clean sink with conditioner/water, swish unit around for 2 minutes (pantene pro-v)
rinse sink and unit
apply tape and re-attach

Everytime i wash unit while attached to my head it is fine. Here is a list of my specs:
French base with 3/4 poly
Supertape
Pantene products.

Thanks in advance!