@cnn: your solution is almost the shortest (well,you can abbreviate foreach with for ; ). And I prefere this one!
But the OP wants to conform to the styleguides of PBP & Perl Critics, and postfix-loops are disadviced!
If I was in this situation, I would prefere
_clean_param($_) for @values;
with the routine transforming $_[0] directly, (it's an alias)
UPDATE: or
_clean_params(@values); # sub takes arr_ref by prototype
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