Just setting the record straight.
I suggest you go back to (such) as the exhumation pathology reports of such as bernadette. What people think is of no consequence. The fact of later wax applied to her face was to avoid the ghoulish appearance which arose from blackening when it was washed. It is not a preservative.
The reality is many of these bodies do not decompose as they should. Nor indeed do (for example) the thousand year old eucharistic miracle at lanciano, still recognisable in pathology as human heart tissue. There is no way it should have survived this long naturally. It should have decomposed in days or weeks.
The eucharistic miracles ( and others such as the bleeding statue of cochabamba) are backed by pathologists and many scientific reports. Several of The miracles have visible white cells. Leucocytes. That is remarkable because they decay in hours in vitro or after death. They are a strong indication the samples taken for microscopy were alive at the time of section. A pathologist robert lawrence (one of many on different continents for different miracles) who examined samples said they are "compelling evidence of creation of heart tissue" from a non living wafer. Note the word creation.
The inedia of alexandrina da costa (not eathing, drinking, urinating, defecating) was observed for 20 days in a controlled and restricted hospital room. She remained lucid, and lost no weight at all. All she consumed was eucharist. She was paralysed so incapable of leaving the room. Those who entered the room were strictly controlled. When atheist doctors did not believe their own results, they extended the trial for another 20 days under even more restrictive conditions. She survived unchanged, just the same.. No weight loss. The doctors wrote a report that admitted it was scientifically inexplicable.
The fakes are annoying (such as the bleeding statue of civatecchia - the blood was shown to have the same DNA as the owner of it!) because the fakes serve to distract. But one fake does not alter validity of genuine miracles.
So just because some doubt it, do not dismiss them, do the digging and discover it is validated by medics and scientists.