Second hand Angelcare bath support

How would you go about cleaning this? It was given to us by someone that got it from somewhere else, either yard sale or second hand store. Which it is something we needed & have no problem using it after I find the best way to clean it. It's still in great condition & not really dirty but will not use it till I feel it's clean enough as I have no clue who used it or where it come from.

Any advice on how you would clean & possibly sanitize it to where you would feel comfortable using if it would be greatly appreciated!

Currently 38w 4d so hopefully someone has a pregnant woman friendly way to clean it without anything that has a strong odor otherwise hubby will have to do it.