I was seeing a lot of clothes moths all around the house, a few weeks ago, in spite of moth repellent strips placed in drawers and cupboards among woolens.
Sometime later, I noticed an old duffle coat, in a wardrobe, that I'd forgot about, which had become infested with moths and their grubs.
I disposed of the offending garment and I can say that I've only seen one or two moths since.
So I agree, moth repellents are well worth using!