Housekeeper here. Ecolab peroxide multi-surface cleaner for glass and literally anything else. Takes the soap scum off of shower glass and leaves mirrors, etc. streak free. Oven cleaner spray & a magic eraser for shower floors that are really grimy/black. Pumice Stone for rings in the toilet you can’t scrub off with a toilet wand. Also not a cleaning tip or industry secret, but make sure to replace old bath rugs if you’ve had them for a long time. The water that gets underneath them over time can wear away at the bottom of the rug and crumble, leaving your floors a disaster to clean if you try to move it. To make your pillows look nice like hotel pillows, tuck the leftover material inside the pillow on one end and then tuck the other side in as well. Have a lot more, not so much industry secrets, just things I discovered working in the industry that I found interesting and helpful.