Lavatory treatment devices comprise a lavatory treatment composition which includes: up to 50 pcnt wt. of an adhesion promoter constituent based on a fatty alcohol polyglycol ether as may be represented by the following structural formula (I): within which, R is an C12-C24 aliphatic mono- or poly- alkene moiety, and n has a value of from 1 to 50 0.01 - 25 pcnt wt. of an organic solvent constituent, which is liquid at room temperature (20oC) 0.1 - 25 pcnt wt. of a detersive surfactant constituent optionally a co-adhesion promoter constituent, preferably based on one or more oxyalkylenated compounds further optionally one or more further optional constituents which may impart a further aesthetic or technical benefit to the said lavatory treatment compositions and, to 100 pcnt wt. of water. Preferably the lavatory treatment compositions of the lavatory treatment devices are ringing gels.
