The ornamental design for a high-pressure cleaner, as shown and described.
FIG. 1 is a perspective view of a high-pressure cleaner;
FIG. 2 is a front view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a rear view thereof; and,
FIG. 7 is a bottom view thereof.
The broken line showing in FIGS. 1–7 is included for the purpose of illustrating portions of the high-pressure cleaner and forms no part of the claimed design.