Washing My Lunette Selene?

 So, This is my 2nd cycle using my Lunette cup, I love it.  If I ever need a new cup again, this is the only brand ill buy. Anyways with washing my Lunette cup I do have the Lunette Feel Better Wash,  it's so damn expensive but so is other cup washes in general, lately I've been using The Summer's Eve Feminine Wash for Sensitive Skin. It says its soap free hypoallergenic there is fragrance though I use it to wash my external vaginal area too no problems. Is this okay to use on my Lunette cup too?