Save your knees
I bought this 11 x 18 inch Fiskars Ultralight Kneeling Cushion in 2011 for $8 and have used it hundreds of times since then. It has come in handy when repairing appliances, working on and washing cars, weeding, and any other activity that requires getting on my knees. More recently I bought these $7 Fiskars Ultralight Knee Pads, which let me crawl around the backyard or garage without pain. —MF