As a Crime Scene Investigator our typical day is working on case work, this means writing reports, inventorying evidence collected from the scene, additional photography of evidence and processing. Packaging evidence does take a while and turning into the Evidence Room can have it's challenges, as you have to document everything you get. We do have some extra duties, for instance, I make sure our supply of equipment and collection items (bags, swabs, envelopes) are in stock. I will request quotes from vendors for items we need and then send the requests with the quotes up the chain for approval.
We usually have scheduled training, but we are always looking for more and if we find webinars or other training online, we will do that. We maintain the various units (trucks, vans, and our Command Unit) to make sure they are ready to go - stocking them up or inventorying them. And we will also clean up our processing labs and bay area and stocking those up.
We provide a lot of training to our Deputies, Detention Officers, and other agency Officers - so we prepare power points and get equipment needed for those trainings. We also go to schools and talk to elementary, middle, junior high and high school students for career days - so we do a lot of that at the beginning of the school year and towards the end of the school year. I have also gone to our local university and community college and talked to students about careers and educational needs for this career field, which also includes the crime labs, corrections and going into the legal systems (courts, lawyers, etc.).
So, as you can see, a typical day may have a crime scene call out or two, but sometimes we don't have any call outs. It depends on the area you live. If you live in a big city, most likely if you are on call you would go to several scenes a day. However, once off your on call status, you will need to work on case evidence and reports.
As far as cleaning up the scenes, we don't do that. There are special companies that do that specifically. Several that I know of are : Bio-One, Spaulding and Aftermath - just to name a few. They are the ones who go out and clean up after deaths (homicides, suicides and unattended deaths at home or other locations). That is a much harder and difficult job (as you have to deal with chemicals used to clean up with). It is very time consuming and messy.
I hope I was able to answer your question. Have a great day.