The actress recalls the emotional final day of filming and the importance of tackling transgender issues on the show
Credit: Diane Bondareff/Invision for Febreze/AP

As Glee nears its series finale, both Gleeks and the cast have begun to mourn.

Jane Lynch – whose character Sue Sylvester reinvigorated the art of the snippy one-liner and made track suits acceptable office apparel – tells PEOPLE she was flooded with emotions while filming the show’s final episode last Saturday.

“It was waterworks,” admitted the Emmy winner, 54, who teamed with the ASPCA and Febreze on Wednesday to educate pet owners against the affects of noseblindness.

“There are some takes I’m sure they can’t use because we were all weeping,” she continues. “It was hard to get through.”

Lynch says the show’s impending end is “unreal. Surreal and unreal. I can’t believe it’s over. It hasn’t hit me yet. It’s been one of the most wonderful experiences of my life.”

With only four episodes remaining, Lynch confesses, “I don’t want to face it.”

One thing she has been happy that the show used its final stretch to face: transgender issues.

In season 6, Coach Beiste (Dot-Marie Jones) transitioned from a woman to a man, and Lynch says, “Those scenes, for me, will go down as some of the most special.”

She complimented Glee creator Ryan Murphy for his willingness to “bring this stuff up. Anything that’s got stigma around it that shouldn’t like deciding how you want to live your life as whatever sex you want to be – [that’s] nobody’s business but theirs. And I love that he took it on.”

Glee airs Fridays (9 p.m. ET) on FOX.