It may not be viably possible depending upon the situation. Of course, one would wash with a detergent first. Then try this home remedy: This is a natural disinfectant: Rinsing with vinegar, then following rinsing with hydrogen peroxide. The sequence can be reversed, but the two mixed together are much, much less effective. Another idea: Try one of these ozone machines (not necessarily an "ionizer"). Of course, this may not be practical if you don't have one or a friend who has one. The ozone produced often removes odors because the odor causing agents are broken down by the ozone. Actually, hanging up washed clothes to dry outside in the fresh, moving air along with sunlight can help. Sunlight (UV rays) do produce some ozone; and the sunlight often breaks down different chemical compounds along with inhibiting some microbes. Zeolite. This is actually a natural mineral. It has some great absorbing properties. Often companies will modify it somewhat in order to achieve certain qualities. If you do a Google search on this mineral, you will find different products promoting and promising that their product effectively will handle odors. There are other benefits which this mineral can offer. Zeolite is often used for lawn and garden problems because of previously used harsh chemicals plaguing the new owner.

If you're talking about brand new dark blue jeans, the smell is from the dye. Wash them alone in plenty of hot sudsy water (warm is okay if you don't wanna change their size!) using detergent, and some borax added (using whatever the box recommends). In addition, add a double dose of fabric softner to the rinse cycle. If you have one of those center pieces for the softner, fill it but also add more when the machine gets to the rinse cycle. Be careful not to spill any on the jeans, or it will leave a mark and you'll have to wash 'em all over again. This procedure should eliminate the dye smell.