How to dispose / close Crytstal Report / Viewer & ATemp Folder properly ??

Question

  Hello Friends ,

   In My Application , we are facing Issue of Crystal Report max job limit Issue  - 75
 "The maximum report processing jobs limit configured by your system administrator has been reached"

We know 2 solution
1) To clear temp Folder
2) To increase value of Print Job limit from Registry

but we require to solve this issue from Application
 
 Is it problem that even we close Form & set  Crystal Report object to NULL  , Crystal report is not removed from Temp Folder ?

 so my question is
  "How to clear Temp Crystal Reports from Temp Folder from Application "  ?  or
  How to dispose / close Crytstal Report / Viewer properly ??

 
 Regards,
Yogesh