My dehumidifier hose leaks at the floor drain. How can I get a better, leak-free connection?

The hose is likely not secured properly or the drain is slow. Use a hose clamp or zip tie to fasten the hose end to the drain grate, ensuring it's not submerged and can't slip out. If the drain backs up, the issue isn't the connection; you've got a clog that needs snaking. Don't waste time on the connection until you confirm the drain itself is clear.