There are a few things you can do to get your sink caddy to stick to the sink: 1. Use suction cups: This is probably the easiest way to get your caddy to stay in place. Just attach the suction cups to the underside of the caddy and then press it firmly against the sink. 2. Use adhesive strips: If you don't have suction cups, you can try using adhesive strips. Just peel off the backing and stick the strips onto the underside of the caddy. Then press it firmly against the sink. 3. Use velcro: Another option is to use velcro to secure the caddy to the sink. Just attach velcro strips to both the caddy and the sink, and then press them together. 4. Use magnets: Magnets can also be used to hold the caddy in place. Just attach a couple of magnets to the underside of the caddy and then stick them to the sink.