This is sort of a DIY, but more of a money-saver tip.
Do you know what the main difference is between regular liquid hand soap and foaming hand wash? Water. I learned this little trick years ago, and it's so simple. It saves money, and reduces waste.
First, you need a foaming handwash dispenser.
I do occasionally replace the dispenser when it's worn out, but it's a pretty simple routine all in all. What are some simple things you do around the house to save money?