Harsh chemicals are not great for the environment or your skin or your lungs. You can put some vinegar, clear, into an atomiser- spray it on all over your shower screen- leave it on for half an hour then come back then rinse it off. It is very good. Also, to descale kettle in hard water areas- if very scaled up use clear vinegar of lemon juice + cover the total area that is limescaled and leave over night then clean the next morning- guarantee it will work. To clean often is better + easier, too :-) Do most of cleaning by traditional means + works fantastic! Husband said to me that newspaper scrunched up to dry off the vinegar works very well, too. Banana skins are great for cleaning shoes, too! The cheaper products are the ones that are best for the environment too- like clear vinegar or lemon juice ;-)
Warm wishes, Bea :-)