It could be leaking from the filler and going round the bottom of the drum or the feed pipe. check the seals can assess the bottom seals with out taking the top off. turn off washer and unplug cable and pipes. tip washer on side to gain access lower pipe is drain feed and right is breather pipe and door lock sensor line. if you need to take the top off as the leak is on the filler screws on back. then pull back and lift up the top. check the pipes and case on the filler tank. replace top in reverse order.