All I did was shake, press the tip to get the liquid flowing (not too much pressure, don't want to wear it out too quickly), gentle wipe with my finger as I went, up and down... some needed it twice... very easy and no mess. Yep, that unibond grout reviver pen for my bathroom tiles is great! 😜😝😂 Having a bath before I head off for my studio shoot this afternoon. What are you up to today? X