comb filter - when peaks are not equidistant

I am trying to use a comb filter to clear up my spectra, I would like to get a spectra with peaks that are 20% or more of the magnitude of the predominant peak to be included ad zero elsewhere however I m not sure how to specify this with my comb filter as most of the examples shown in the documentation seem to be for peaks that are equidistant apart. I am using [pks,locs] = findpeaks(x,'MINPEAKHEIGHT',20/100*max)

how can I then apply a comb filter correctly?