Problem with my toilet flapper?

Replace the flapper,as these things wear out,just like everything else. The holes on the arms, where it hooks up will get crud in them,or will just wear, and then become oblong,or oval and cause the thing to stick.

What type of flapper do you have? If your flapper has a timing cup on the back, perhaps the little drain hole has become clogged, Is the flapper rubbing on anything and getting hung up? If no to both , I would replace just the flapper.

Is the flush lever getting stuck?

it quite is a difficulty-loose subject with replaced flappers. it is commonly no longer uncomplicated to understand why it happens. What you're able to do is set up something that limits how a techniques the flapper opens, shop it under "right away up" with a stop of a few form. yet then you definately might ought to hold the lever for a stable flush.

If it is just the chain binding on itself, that can be an easy fix. Sometimes, regardless of shortening the chain, it can still get caught up in itself and any link shorter may not be an option because then it would be just too short and still waste water over time. Try a small plastic, lead weighted fishing weight near the bottom of the chain where it connects to the flapper.

I would change the flapper out, also the trip lever might have something to do with it- the length of the arm. Is the trip lever the original or is it a replacement?

I would change the flapper out though, they're cheap.

Replace the flapper, they cost about $5.

Sounds to me that when you installed the new one to close properly, you didn't cut off the excess chain from the flush handle.

for $2, replace it.