On 07/26/2017 04:44 AM, Bob wrote:
Could anyone please suggest a toilet bowl cleaner that
actually works, other than the one(s) that are apparently
nothing but Hydrochlorlic (HCl) acid ?

Suggest a cleaner that works other than the one that works? You might
try phosphoric acid. You can find it in Home Depot around the concrete
supplies. It's used to etch concrete but is not as aggressive as
hydrochloric. It's sometimes used to descale coffee makers. Even vinegar
might work but I wouldn't count on it.