Today I completed your quarterly pest control service. A liquid residual treatment was applied around the exterior of house and in crawlspace. Also a moisture activated granular application was spread around the exterior perimeter of home. Glue boards were placed in crawlspace to help control and monitor any activity. I was only able to access about 1/4 of crawlspace. The rest of crawlspace is too tight of an area for us to access. If the activity returns in bathroom, call our office to schedule a service call. Most likely the insect you saw from what you described, was a carpet beetle or springtail. Please contact our office if you have any questions or concerns. Thank you for using Green Pest Solutions and have a great day.