How often do you change out glycol for fresh?

[Rob2010SS]

As the title states, how long do you go before you dump your glycol and make a fresh solution?

I’m going on two years with ours. Seems to still be ok…

 

[Tom R]

Mine's about two years old, I don't see any reason to change it out.
And that stuff is spendy!

 

[Jag75]

Mines about the same . Haven't looked inside but it's working lol

 

[Rob2010SS]

Good info. I saw an Instagram post where someone was talking about the importance of changing your glycol at least once a year and I had never heard that before. So was curious on the legitimacy of that.