See if you can find a small/thin fiber brush that will slide through the channel easily or maybe you'll get lucky at TT will drop one in the mail for you!

I use a twig I find in the woods...Drives me nuts when the mud gets in that groove

Depending on how wet and muddy it is outside I have used a variety of items including towels, tees and a pitch mark tool. The pitch mark tool is the most common since it is plastic, straight and flat but sometimes I do worry about scratching the club even with the plastic tool I use to clean it. Then if it was wet outside at the end of the round I will clean it good with a damp towel.

I use this. It's made specifically for the ARC slot. Works perfect. Hangs on my bag next to my Frogger groove cleaning brush..

Doug E, that looks perfect. I can't find it on sale online, where did you get one?

I use a wooden tee most days, but I would love to have a brush like Doug E showed in his picture as well.

Wet towel!

I use a wooden tee. Works just fine.

If you have any old casino member cards that have the hole and the extending string on it, you could use that. Snap it on to your bag and you can pull it and clean the channel and then let it retract back. NBD and you don't have to worry about scratching your club since it's plastic.

I use twigs and thicker leaves. However, I found that the best is gliding the scorecard thru. The titleist tool looks good from the other post, but I haven't seen it in the stores.

I use the scorecard. It seems to be the best thing that works for me.