huge netscape cache, cant remove it within netscape

["Jack Byers" <byersj hotmail com>]

I seem to have built up to a huge netscape cache
[byers byers .netscape]$ cd cache
[byers byers cache]$ du -s
733740  .
that looks like 3/4 of a 1gig to me

when i gointo edit preferences advanced cache
and then try to
clear disk cache
and
clear memory cache

it seems to have zero effect,
du -s  on .netscape/cache still just as large

Is there something else i should be doing within netscape to
try to fix this?  this is netscape 4.08, rhat5.2

alternatively is it safe just togo into each .netscape/cache
dir and rm all of the files ?

thanks
Jack

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