If you are not wiping down your blade properly, all that residue, soap, skin, blood and oxidation,(rust) is getting on your strops.
Rinse in hot running water and then dry with a microfiber towel, 3-4 times to remove all the stuff.

Take a clean damp white paper towel and wipe your strops separately and see what comes off, you may be surprised. Linen and webbing can be washed, and webbing is not that expensive to replace.

All that “cheese” can scratch the bevel and lead to chipping of the edge.