Actually I think felt has been used more of a scapegoat than anything else. It certainly has been great for the boot manufacturers in areas where it was banned and everyone had to switch. It didn’t mean people still didn’t spread the spoors just as much. The point is more education on cleaning ALL you gear that comes in contact with Didymo infected waters, driftboats, traditional nets, boot laces, crevices in you waders (seams) all will harbor spores from one body of water to another. And that is the key not transferring, as control at this time is the only option.
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New Zealand has a great Didymo awareness campaign much more effective than the silly felt ban called ‘Check, Clean, Dry’:
Check – before leaving a waterway, check for clumps of algae. Don’t take debris found at the waterway.
Clean – for at least one minute using one of the following: hot water, a two per cent bleach solution or a five per cent solution of salt, dishwashing liquid or antiseptic hand cleaner.
Dry – make sure your items are dry to the touch, and then dry them for an additional 48 hours.
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I have a bleach bucket in the garage that I soak my felt boots in, it has more than 2 percent more like 10. It’s a good idea to hang you equipment so that it dries completely, between trips I also like to hose down waders etc. We need to be the stewards to this; unfortunately there is both not enough education and apathy to clean. This would include pooled water in boats, motors, and launch plus recreation vehicles.
More information here.