I suggest you mix a solution of 5 parts water, 1 part alcohol and a squirt of liquid soap. The alcohol will penetrate the outer coating of the mealybugs. The soap will help spread the solution over the plant tissue.
The key to success is to get complete spray coverage until all leaf and stem surfaces are dripping wet. If you don't make a mess, you are not being thorough enough. Be sure to get the spray deep into the crevices where the stems emerge. That is where the nearly invisible juveniles hide and mature.
If a stem is leaning, you can reposition it slightly in the pot and tamp the soil down around its base to hold it in place. Learning stems are often a result of repotting. Tight roots help keep the stems in place.
