I feel like the most annoying part of the meth cook job is not having a spot in your base for your gas pipe for ventilation, or that a teammate put it in a dumb spot so now you take rad damage in that spot.
I was told that the gas mask in the cosmetic shop actually works. However the price of the mask is too expensive for me to test that based on a hunch.
I honestly think however that the meth cooks should be able to either get or buy a 1 life use gas mask to lower/remove gas damage
As well as (to make it fair) give any anti drug CP jobs to get it to make the job more popular and useable