How do I word a polite notice about toilets in Mandarin? My friend has asked me how to translate a sign asking people using a bathroom (toilet) at the tourist attraction where she works. She wants to ask that they do not to throw toilet paper in the wastebin/basket but instead to put it in the toilet bowl (and flush).

I'm not good at formal Chinese, but I've done a little research and have come up with this as a suggestion. Could you let me know if it's OK?

请勿将卫生纸入篓

卫生纸应扔进马桶

Thanks!
Written pretty well, I would just suggest switching the order...first sentence last, last sentence first