Real Simple’s testers pushed 35 mops over ceramic tile, linoleum, stone, wood laminate, and finished hardwood (water on unfinished hardwood can cause warping and other damage). All 35 were also sent to Debra Johnson, corporate training manager at Merry Maids — a cleaning company that mops up more than 300,000 U.S. homes a month — so she could test them and weigh in. And the winners are…