Vegetables, fruits, new tools for kitchen (cups, teacups, various pots, towels, etc.) or clothes (T-shirts, underwear !!, etc,) I always wash everything before using or wearing. If I buy a new coat I do not take it to wash in the laundry but at least I put it out of the window and I pass a damp cloth just to remove residues .. the reason I think is quite obvious. In a store, the things exhibited or even just folded like t-shirts, are available to anyone, everyone opens things to see them, try them, touch them (who knows what hands!). In addition to this the dust. Every spring I bring in a laundry coat or winter jackets to be washed and kept in the closet clean and perfumed.