>>9856175I see.
We digress. To answer your question concerning the matter of smelling the panties of Yunyun, my answer would heavily depend on factors not described in the OP.
What detergent does she use? Tide and Gain are honestly overrated, I'm more of an All guy myself. And did she use fabric softener? Perhaps more importantly, how big was the load in the washer, and did she separate her uncolored/lightly colored clothing from her colored clothing? How long was the washing cycle?
This is vital information.