I have been using the non biological laundry liquid for a few months now. As I live in a soft water area I have always followed the instructions to top up the concentrate with a little water and shake well before first use. This time I was left with a gloopy lump at the bottom of the bottle which would not separate out. I finally put the whole gloopy lump in the machine and got the cleanest wash I had had for a few weeks. It would be preferable if there were no gloopy lumps at the base of the refillable plastic bottle. I think I may need to use more laundry liquid than the standard cap dose to get really clean textiles and may need to dilute the concentrate further to avoid the gloop.