Slow flush toilet

[Nlhawkeye88]

Good day!
One of our toilets is flushing incredibly slow, like 8-9 seconds for it to make gargle noice.

I’ve used a 6ft auger/snake and didn’t come across any resistance or clog. Is it possible there is a clog deeper than that?

I’ve used draino as well and still no luck. The device inside of the tank seems to be working just fine.

This is a guest toilet and not often used so I’m not sure what could have changed and when.

 

[Snoonyb]

Welcome.
May very well be a blockage, like a scum deposit, in the vent stack, which can be addressed from the roof, or a clean out above.