Best Way to clean your tub. Period. Make a paste of Borax for that grimy tub and tile or try swimming pool tile cleaner. For soap scum and water spots on glass doors, use equal parts of hot vinegar and Dawn dish soap in spray bottle. Just spray it on, scrub, rinse and be amazed. Allow it to sit overnight for stubborn stains and scrub with a dryer sheet or magic eraser.
To clean your microwave, boil vinegar water in microwave. Steam will soften up stains and absorb smells. Just wipe clean. Have tried this and it actually works! It just makes your kitchen smell like vinegar briefly