1- Large , heavy duty tarps. I got a 7' x 9' for $4 at Harbor Freight Tools 2- Duct tape 3- Bungee ties
Step 2: Measure & Cut
I gave this to my kids as an engineering project and they didn't have much pics. Basically, you lay the tarp on your grill, fold over the corners, cut off the excess, and duct tape the seams. I guess one can use ironing too ...
Step 3: Flip Inside Out
Now it's just cosmetics. My daughter use yellow duct tape for the duck, get it ?
Step 4: Thread A Tide Down
My old cover had Velcro, but it got brittle & broken off. Might as well fix this too
Just open one end of the bungee, thread thru the metal grommets, and tie off the ends.