I had an infestation last September/October, ate through some carpet in DD's wardrobe, lots flying around. Found they were nesting in a sheep skin rug she had stored in there, and also a sheepskin teddy bear in another wardrobe.
All I did was take everything out, hoover and wipe down. Spray the wardrobes. Obvs chucked out the two sheepskin items. No clothes were eaten. One thing with many pleats had loads of eggs on, so I chucked that too.
When I had aired the wardrobe post spray (Rentokil and Acana), I doubled up! I then put hanging Acana and Rentokil killers in all the wardrobes, and haven't seen any in those since. I also put the little tabs in drawers with woollens just in case.
Now, there have been a few fliers around since, particularly this Spring, so also put sticky things up, but only caught a few. I went through a period of squashing three or four a night in the two worst rooms, but haven't seen any now for two months.
I will stay vigilant, but I think the odd one will always be around. Sept/Oct will be telling.