This is pretty decent glass cleaner, better than Windex in cleaning glasses or mirrors. When the top says 止 which means stop, it would not spray. If you move the notch to 泡 (bubble) n flip the spray cover open, it will spray. (See pics). The only complaints are: (1) Sometimes there are too much bubbles n not enough liquid; (2) The bottle is very small n it will not last too long, with its cost almost $6 a bottle, it can be costly. Kao did make a refill for this glass cleaner, may be Weee! will sell it here.
