I'm a poor experimentalist (so poor I later switched to computational chemistry), but these procedures were absolutely impossible to follow once you got down to the details.
My advisor told me "yeah. we don't try to replicate anything that comes out of that lab." and left it at that.
Sobered me up real quick to the realities of how widespread these bullshit cheating practices are.
Off-topic, but related: "Reproducibility trial: 246 biologists get different results from same data sets" (https://www.nature.com/articles/d41586-023-03177-1)
People who have been up to shifty things should be very nervous, and those entertaining doing shifty things should consider that it's very likely it will be exposed in the next decade.
Warren Buffett is pretty open that some kind of fraud is probably occurring at every one of his companies.