Crud is the perfect food for cockroaches... They love soap scum and when you throw in the oils and and human protiens it nakes for a complete food source so...

...I'd usggets that rather that bottling it where your cockroaches can't get to it put a little on your kitchen counter at before you go to bed at night and you will have the fattest and happiest cockroaches on your block and...

...you will be the envy of all your neighbors... Guarenteed!!!

B~