A completely vague question.
A toilet can be kept clean with a toilet brush or even with a toilet tablet that sits in a cradle and that you clip onto the side of the toilet pan, never put any kind of liquid or tablet into the cistern with the working parts of your toilet. its pain when doing maintainence and the chemicals can shorten the life of the plastic working parts
The float in your toilet may not be working properly due to issues such as a faulty valve, water level adjustment, or debris blocking the float mechanism.
flush your head in the toilet
your toilet is working correctly,the reason it does this is because toilets flush by weight
If your toilet flush is not working properly, you should first check if there is a blockage in the toilet or the pipes. You can try using a plunger to clear any clogs. If that doesn't work, you may need to call a plumber to fix the issue.
clean it with used toilet paper
because the upstairs toilet drain was clogged up.
If the toilet stopper is not working properly, you should try adjusting the chain or flapper to ensure it is sealing correctly. If that doesn't work, you may need to replace the flapper or seek help from a plumber.
A working toilet
To replace a 4-inch toilet flapper in a toilet, first shut off the water supply to the toilet. Remove the old flapper by disconnecting it from the flush valve. Install the new flapper by attaching it to the flush valve and ensuring a secure fit. Turn the water supply back on and test the toilet to ensure the flapper is working properly.
Your toilet float may not be working properly due to issues such as a faulty valve, water level adjustment, or debris blocking its movement. This can result in either too much or too little water in the tank, affecting the flushing mechanism.
To replace a toilet flapper for a 4-inch toilet, first turn off the water supply to the toilet. Remove the old flapper by disconnecting it from the flush valve. Install the new flapper by attaching it to the flush valve. Turn the water supply back on and test the flush to ensure it is working properly.