We investigated the topic of pathogen survival on surfaces during the pandemic.
As a general rule, most human pathogens don't survive longer times (over a week) on surfaces. We did this for a while to our packed grocieries in the times of large anxiety when everything from the supermarket was considered potentially mortal.
Thus, you can "wait-sterilize", putting the purifier into quarantine for a while. Warm temperatures and humidity decrease the survival rate of most bacteria.
Specifically, Mycobacterium tuberculosis is also very sensitive to sunlight, so giving your purifier a sunbath might also be helpful. (I am not sure whether you are concerned specifically about tuberculosis or if you took it as an example)
Here are some numbers,
https://pmc.ncbi.nlm.nih.gov/articles/PMC7916105/
but you need to take into account that "survival rate" also means that a scientists detected some DNA on a surface, which does not mean necessarily that somebody could get infected by touching the object.