Hi Wolfie .
There are two approaches to this .
1) let the swarf build up in the tee slots then drag them out with a tee slot cleaner or vacuum them up .
2) Stuff something into the vacant tee slots to stop the swarf collecting in there in the first place .
I found that if i’m only doing a small amount of machining to a part then i use the first approach but if i am removing a lot of material like cutting dovetails or deep slots i use some cheap garden hose or similar to fill the tee slots i am not using .
This takes but a few seconds to do ,makes the clean up much easier and the hose is re- usable { also works on lathe tee slots } .
Another thing i use is a small ice cream container {plastic type} to collect the swarf that i brush off the table , I just hold it under one end of the machine table them brush the swarf towards it – saves on having to clean up more from the floor .
A Vacuum cleaner{wet &dry is preffered } is a valuable item to have as this makes cleaning the remaining swarf that is left on the machine,bench and floor easy to collect and will suck out most of the swarf from the tee slots but i save this for the final clean up of the day .
Ian