How to delete instances created by duplicateMovieClip

[hayored]

Hi,
I created a rain effect using loop:

function make_rain() {
c = c + 1;
duplicateMovieClip ("_root.drop", c, c);
setProperty (c, _x, Math.random() * 200);
setProperty (c, _y, 300 + Math.random() * 10);
}

After a while a rain becames too heavy, so I tried to delete some instances, by adding statement:

if (c > 5) {
delete "_level0." + (c - 5);

}

Using debbug I verified that the instances have a name: "_level0.n", where "n" is a running numer, but delete statement is not working.
Any idea how to delete those instances?

Thanks,

YH

[xxlm]

removeMovieClip