Aging temperature question

[Storm256]

I warmed a little over a cup over milk to 86F added an appropriate amount of the questionable rennet plus a drop or two and set it on the counter. An hour and a half later it looks exactly like it did when I poured it out of container zero coagulation........should have done something by now shouldn't it?

[JeffHamm]

It should definately have set by an hour.

Try putting a 1/4 teaspoon of rennet in your cup of milk.  If it doesn't set in 10 minutes, your rennet is shot.

- Jeff

[Storm256]

Added 1/4 teas. nothing after 30 minutes so I guess the jury is in....... Is this common with liquid rennet?  Boy what a way to come out of the gates , fall flat on my face on my first attempt ;)  Oh well it'll make my first success that much sweeter I suppose. Thanks for the help gentlemen I don't think I would have even thought of testing it like that at least for awhile anyways.

[ellenspn]

If where you got the kit/rennet from doesn't store it correctly or has had it for a very long time then it could have gone bad.