Buy new ones
I can tell you about the chemos I was on. Different than yours.
But, my oncologist told me, to make sure my husband wore one.
When I asked why, I thought it was to protect me, well...
he said, so it didn't effect him! It could cause some burning and irritation.
I was on the chemos for six months at a time. And, then, he used one for additional six
months. I think, one night he was trying to put 2 on! lol. I was hot stuff.
Plus, it reduced my chances of getting any kind of infection which I might had found difficult to
fight off.
So, my opinion is just to wear one. Or, 2.