I used to use a lot of Histofreeze spray and it became addictive to use but
never really gave me better sections.  Then I discovered putting the
blocks, after facing, on an iceblock that is melting a bit b/c it's at room
temp and I have never used histofreeze sprays again ... better for me,
better for the block, and I get beautiful sections every time even with
finicky mouse tissues. My advice is to get rid of it. Plain ole ice works
much better.

Andrea