I use the same method as I use with my glasses - I breathe on it then wipe the mist off with whatever T-shirt I am wearing - works perfectly every time !
A minuscule part of white vinegar and water and polish with a soft clean cloth. Glass cleaners leave a residue that builds up, they should not be used.
I just use a barely damp microfibre cloth, then wipe it with another. Keeps it clean. I didn't think you should use lens wipes on IPad screens, but I may have got that wrong ?
I use lens wipes, as they dont scratch the surface , but I've just read the box and it suggests using Smartphone wipes and tablet wipes. Must admit I've never looked for them.