Ds is almost 8mo and has discovered he can roll and does it in his cot, this usually results in him being a bit sick or at the very least dribbling all over the sheet. I put a muslin or blanket over the sheet but sometimes it leaks through. I usually just change the sheet but Dp says that if it is just a little bit it is fine to just dry it of with a cloth or muslin.. Am I being a bit precious changing it every time??i know I wouldn't like to lie on a damp sheet..