First you will want to rinse out your used up bottle of foaming soap. I used an old bottle of BBW soap which you can get during their sales for right around $3 a bottle. After you spend your initial investment you probably won’t have to spend more than another $3 to keep you good on soap for a year. *No kidding*
After you have your bottle ready to go you will want to fill it with hand soap, approximately an inch full. I like to buy the small bottles of softsoap because often I can get a .50c off coupon for them. They also go on sale for $1 at Dillon’s occasionally, which when the coupon doubles (which it does at Dillons … at least at mine) it makes for free soap. Yes Please!! Whenever they have this sale I usually try to stock up so that I don’t end up paying anything for soap for quite some time. If you aren’t in to couponing you can get a big bulk bottle of soap for right around $4-5 dollars and it will last you for a LONG time.
Once you have the hand soap in you will want to fill up your bottle with warm water, replace the lid and give it a shake. There you go, foaming soap on the cheap and possibly even free.
A mixed up bottle will last me a good month or two, depending on my daughter’s overuse. I use to cringe every time she would pump half the bottle of a bbw bottle out but not so much when I spent just pennies on the refill.