We stayed in a room where there were lots of mosquitos inside. Especially on the toilet. We can't sleep well because of that. So we decided to check out the night before our schedule, and upon check out our 500 baht deposit was deducted by 200 baht because our bedsheets had dirt/stain. Which I believe that it could be removed by a bleach. But anyways, we didn't argue about it anymore. At least, now we know. Thanks, anyways.