Mix 1 part cheap lemon scented dish soap to 1 part amonia and put in a hose end sprayer and "wash" your yard and around the doors. You will have bubbles and that is ok.
Saturate everything outside you can as they lay-in-wate for fur baby. If you can find orange- it is better than lemon.
Wash about every 3 days until you feel good about the job. It won't do anythng to plants or chrubs, in fact they like it.