In 2022, AFT Washington brought a bill that, among other things, established a 3.35 hour multiplier for adjunct faculty, to give them a concrete number of hours for PSLF application. The multiplier is in recognition of work done outside the classroom, and is calculated by multiplying the number of in-class instruction hours by 3.35.
The federal government has since passed the same multiplier, so if you are an adjunct instructor who teaches in a state that did not previously have a multiplier, you can now use that 3.35 hour multiplier for all your instruction time.