Just posting in case this (now blindingly) obvious 'hack' is new to anyone.
I used to get through a bottle of Pixi Glow Tonic in probably 4/5 weeks, because twice a day I religiously followed the instructions to 'saturate a cotton pad' and then wipe it over my face.
Then I saw a you tuber just splash some on her hands and pat it over her face ... I've now used barely a quarter of a bottle in 2 months, still using twice a day, and the results are exactly the same! Am I just exceedingly dim and gullible not to have realised this sooner???