After the bath soaps have been used, tiny bits remain. Note that this is not about re-using half-used or little-used soaps such as found in hotels. I am aware there are charities such as Sundara Fund that upcycle them. I want to know what can be done with tiny lefover bits.
If it helps for context : I am from India and the soaps I use are : Mysore Sandal, or Lux , there is no information on whether they are bio-degradable. (I think they might).