Hi Bob

Check the foot that guides the saw, it may have come out of alignment
with the blade. If you are guiding along some edge and the blade plane
is not parallel to the edge of the foot, then you will increasingly be
forcing the side of the blade against the kerf until it binds.

If it is far enough out of alignment, you might even be forcing the
problem because you are eyeballing to the marker on the foot which is
not truly on top of the spot where the blade will be cutting.

Scraper