Why has my child’s latex comforter become brittle / sticky?

Tommee Tippee recommends that you change your little one’s soother every 2-months, as over time, this natural material can become worn. The nature of the latex material means that if it is not changed often enough, the comforter teat can become brittle and/or sticky to touch. Tommee Tippee recommends to throw away at any first sign of damage, replacing it for new.