@Veronica thank you. I rolled it up and put it on the very edge of the mattress and it's not majorly inclined
We put a flat pillow that I had under the mattress to elevate it that way there was nothing in the crib to cause an issue for her. She’s gotten her first cold this past week as well! Its not fun. The elevating seemed to really help her cough along with the cool mist humidifier by the crib. We also did one of those saline inhalers several times a day too
Early on our pediatrician advised us to slightly elevate our girl's bassinet to help with her acid reflux, we used a couple books
We haven't used a towel, but we have used a pillow to prop up our baby to help with congestion. We only did it when he slept with us though. If using a towel in his crib, maybe putting it under the sheet will help? That way if it unrolls, it's under the sheet and less likely to get in his face