In such cases the weeps consist of small-diameter plastic, clay or metal pipes extending through the wall to a layer of porous backfill. Typically, weeps are arranged to direct water which may have entered an assembly from outside back to the outside.
A few of several safe household chemicals to use are vinegar, dishwashing soap and rubbing alcohol, according to an Oregon State University Extension Service publication called Using Home Remedies to Control Garden Pests, (EC 1586). The publication, complete with photos, is available free of charge online.
Apple cider vinegar is one of the most ever-green natural home remedies to treat any disease. It can be used to get rid of fleas as well. To get temporary relief, you can mix apple cider vinegar and water in a proportion of 2:1. Mix it well and fill it in a spray bottle.