Maintaining 3 retail store is not easy when it comes to cleanliness. And it’s located in a high traffic location so expect hundreds and thousands of people passing by. I availed every 2 weeks of cleaning interval to maintain the cleanliness of my glasses. The 2 week span is perfect since Hirange is able to clean my windows and have days of lasting effects. I always appreciate their efforts and professionalism despite on some days that there are a lot of customers on the shop but they remain productive.