Is there a DIY method to sharpening the grooves of your wedges? Up until now, my method has been to buy new wedges every other year. This gets expensive and frustrating. Especially with the new groove changes, I've wondered if its necessary.
As far as physically sharpening grooves on a golf club, I would leave that to the professional.
Why? The high risk is not worth the little reward in terms of attempting to sharpen your own grooves. DIY may lead to buying new wedges anyway. Pro shops offer club services, and if you determine sharpening your grooves by a professional is relatively cost-effective than buying new wedges, this would be the route to go.
Assuming you play often, because replacing your wedges every other year is frequent on average, the best way to keep the grooves sharp is good maintenance. From a performance standpoint, it is beneficial to keep the wedge you have played with and gotten used to for a year or two while maintaining them as close to optimal condition as you can.
Good maintenance for golf clubs DIY is less risky. All you need is a bucket, dish detergent, a brush with plastic bristles (metal bristles can ruin the club), and a towel.
*These methods relate to irons. I do not recommend soaking metal/persimmon woods, hybrids, or putters.