FIG. 1 is a right perspective view of a portable cleaning machine showing our new design;
FIG. 2 is a left perspective view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a front view thereof; and,
FIG. 6 is an enlarged top view thereof.
The details shown in broken lines form no part of the claimed design.