In recent independent tests it took several days submerged in various oils/water/solvents to kill even a few primers out of large batches of several brands. They are infact much more resilient to those things than they were 'back in the day'.
IMHO most FTFs that are blamed on a 'bad' primer are in fact poor headspacing/size die setup or due to not seating the primer correctly.
I've had two in 37 years of handloading. Both were not doubt my fault.