Hi Aleksei,
Thank you for your feedback on the C43913-WH. I am sorry for any inconvenience you experienced with your Delta Toilet. This unit does not have special care instructions; However, it's recommended that you clean your acrylic bathing product with non-abrasive soaps and cleaners such as:
Dishwashing Liquid Detergent
Lysol® Power Bathroom Cleaner
CLR® Bath & Kitchen® Cleaner
Formula 409® All-Purpose Cleaner
Iron Out® Rust Stain Remover
Use a terry cloth towel, soft cloth, or sponge. Avoid using abrasive scrubbing pads, steel wool, or sponges.
NOTICE: When using drain cleaner or clog remover, rinse thoroughly with water.
Please contact us back with any further questions.
Best regards
Nicole
Digital Communications Specialist