Level 17 is very easy, save the brush on the floor to your item column, then tap on the brush and clean the floors to see 4 symbols as shown in the screenshot below.
Tap on these “X” from right to left to change appropriate symbol as shown on the floor. Now open the door and move to next level.
Games Walkthrough Searches:
- 100 room escape level 17
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- answer door 2 level 17