It is true that you cannot help a hoarder until the hoarder wants to change. But there are ways to encourage (in a positive not punitive or judgmental way) the hoarder toward a desire to change.

Have daughter read Matt Paxton's The Secret Lives of Hoarders for a start. He has many good ideas for intervention that actually work, and shares examples of what backfires. Judgmental, critical, demanding intervention absolutely backfires. A hoarder already lacks self-esteem and is often the harshest judge of himself or herself. Hoarders get into denial of the actual conditions and literally do not see it. It's self-protection. Hoarding defends against unwanted feelings and fears.