Tip: For all my machine embroidery friends. Buy some pencil grips and make your hoops more comfortable to grip and tighten.
Latex free silicone type pencil grips. Cut in half then slip them on.
Want to keep your hoops clean from sticky residue. Another Tip: "Williams Electric Shave" on a Viva paper towel or cotton ball works like Magic! ---added bonus; it has a nice fragrance and won't harm your hoops! Rinse and dry after cleaning.