✔ 最佳答案
Remove the handle and arm, and take the assembly to your nearest DIY store like Home Depot or Lowes, and get a replacement. They are inexpensive. The trickling probably means that you need a new flapper. It's that round rubber stopper at the bottom of your toilet tank. So you may need to pick up one of those too.
But another thing to check before you run to the store.
Make sure the chain that connects the flapper to your flush handle hasn't become disconnected.
If it has, that would explain why the handle feels loose, and the trickling might be caused by the loose chain being stuck under the flapper so it doesn't make a proper seal.
Pull the chain out from under the flapper if it is stuck there, and hook it back on to the arm of the flush handle if you can.
If that doesn't help then you may need to call in a professional.