The ornamental design for an electronic steamseat, as shown and described.
FIG. 1 is a perspective view of an electronic steam seat, according to the present invention;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The oblique lines of the drawings indicate transparent or semi-transparent material for those parts of the design. The broken lines of the drawings depict environmental subject matter and form no part of the claimed design.