OT- Stretching shirts with 9% Latex

[emma'smom]

I bought 5 t-shirts for Disney that I was hoping would be perfect. They are the longer tunic style cut...much better for my body shape than the teeny bopper mid-drift style they used to sell everywhere. Anyway, they are 91% cotton and 9% latex. I really don't like the clingy-ness that the latex gives the shirts....but I love the shirts (and I've opened them and even worn a couple..so there is really no returning).

What tips can you offer for breaking the stretchiness of the latex. I have old t-shirts that have "lost their stretch"....and now I like them more. However, this happened over time. Any tips for speeding this up so I can be more comfortable in my new shirts?

Thanks!