no need to fell that way..
...the same thing goes with your text/email....they also need to be deleted every once in awhile.
There are tons of (freeware) just google "wm5 freeware"..etc.
On IE in the go to menu/tool/options/memory and clean it out....on your text/email go to that program....and in your "menu"..I am running wm5 but you will a selection to "delete".
Remember all these things will eat up memory and will cause the phone to lock/freeze...so remember to do some maintance and it will run just fine.