stopping a process

I'm making a project with several pages and on one page a procedure has
a lot of "when" processes starting such as this:

 

when [touching? "comb "suitcase]

[comb, setsize 30 valise, insert "| comb|]

when [not touching? "comb "suitcase] 

[valise, top

      search "| comb| cut

      comb, setsize 40]

 

Then a button gives the command to go to another page and at that point
I want those processes to stop (there are 48 "when" processes on the
page) to free up memory for the rest of the project. I've tried a lot of
variations of using this command:

 

cancel [touching? "comb "suitcase]

cancel [not touching? "comb "suitcase]

 

in various places and the "when"s just won't stop. Anyone have any
ideas? Maybe having those processes running during the rest of the
project won't adversely affect subsequent processes in the end.

 

Thanks,

Erik Nauman