My MMF has been too soft and sticky lately. I've read that if you add a little tylose it will help stiffen it. It that true? I can't find tylose in my town, but I have found gum tex. Are these the same thing. If so, how much should I add? How much do I need to add if I'm making bows or making sculpted figures?
Yes, they're pretty much the same thing.
Personally, I think that tylose is a bit "stronger" and that sometimes gum tex can give a yellowish cast to white gum paste.
There's no exact science to what you need to add. It's trial and error and can depend on heat & humidity.
Try adding a 1/2 tsp. to 1lb. Make a test piece and if you don't like the result, add a little bit more until you get the results you like.
When it's humid, sometimes MMF needs a little less water than otherwise. You might try that first.
The main difference between gum tex and tylose is that gum tex is slightly pinkish and has a distinctive smell. Tylose is white and has no smell or taste.
When you're making figures, add enough that you can feel your MMF start to stiffen up a little bit. You can make bows with straight MMF if you have several days for the pieces to dry.