From SciShow.

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Dry cleaning has gone from kerosine to perc to wet cleaning in an attempt to make it less …deadly. Over the years, dry cleaning has evolved to address the dangers of flammability, interactions with your lungs, and environmental harm, among other problems. Here’s that story.

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Sources: https://docs.google.com/document/u/1/d/e/2PACX-1vRI-M6eKomTWS8-g3tOniEGOJawypn0Eg7g0FaEbTHLEarxBk3X4RHVisFiU5wjaNEXAr6wd0B5nwLu/pub