i know. ive tried diy stylus as in youtube already. it does work yeah.

but the thing is, first, theres no sensitivity pressure on it. eventhough iphone 6s+ does come 3D touch which the sensitivity pressure are applied to its screen, the wet cotton is not hard enough to put a pressure and trigger the 3D touch.

second, the tip of the stylus have to be moist or a little wet to make it work. which causing waterspot on the screen.

third, its not really durable because you have to make sure the cotton are wet and you have to change new/ resemble the whole thing. plus the tip not really precise

thats why i dont prefer DIY stylus. but thanks for your suggestion anyway