Which word means 'too sweet' - 'cloying' or 'gluggy'?

I just had an interesting conversation with my NZ colleague regarding some sweets on the table. I turned down her offer, saying it was too 'cloying' for me, which got her stumped. After I explained what I was trying to say, she said that she would say 'gluggy' instead. I searched online and found the definition for 'gluggy' is 'Liquid and viscous; moving slowly when poured. The jelly was not yet set, but quite gluggy', which doesn't seem to be the right word. So, I'd like to know what native speakers think about these two words.

Thank you in advance.

Kind regards, Danny

Cloying is described in on-line dictionaries (not specific to NZ) as sickeningly sweet, and is used to refer not only to sugary treats but to odors and overly sweet scenes in novels, sitcoms, and the like. "Syrupy" is one synonym, probably referring to a sweet syrup one might put on pancakes. Thus, "gluggy" might be an NZ word for syrupy. "Cloying" is in common use in the United States; "gluggy" isn't.

Gluggy refers to a near-fluid that is and sticky while cloying refers to almost the same thing but slightly thicker. It seems reasonable that in NZ English the two might be interchangeable at a certain level of fluid thickness.

I'm not an NZ native but I have NZ friends who use the word "gluggy". Here in the UK a fluid that is "glugging" doesn't have the same expectation of thickness applied to it.