The toilets in our house are 911 waterproof, both toilets have no windows and have been renovated

911 polyurethane waterproofing coating does contain volatile toxic gases. This friend, I can only say that you made a mistake when buying waterproof coatings. To get rid of odors, you can buy some air purifiers, and the effect of using grapefruit peel to remove odors is also good.

Be sure to keep the room ventilated. No more, we can only redo the waterproofing, shovel the 911 polyurethane waterproof coating, and repaint it with a new polymer cement-based waterproof coating, which is non-toxic and harmless, water-based material.

Blow it with an electric fan for a few days to see, alas, I regret that I didn't use environmentally friendly materials at that time, hehe.

Put some plants that purify the air, don't worry that those plants will be smoked to death.

Then get some green home bamboo charcoal bags.

Do you have an exhaust fan in your bathroom? Turn on the exhaust fan for ventilation.

To be water-based, this has to be left for a long time before the leaves can be eliminated, or you can buy some environmentally friendly waterproof paint, brush it on, and cover its smell.

Go to the supermarket and buy several generations of carbon, air purification carbon, put it inside, and stay for a week before it will be tasteless.