Lavatory treatment devices comprise a lavatory treatment composition which includes:up to 50% wt. of an adhesion promoter constituent based on a fatty alcohol polyglycol ether as may be represented by the following structural formula (I):R—OCH2—CH2—OnH (I)within which, R is an C12-C24 aliphatic mono- or poly-alkene moiety, and n has a value of from 1 to 500.01-25% wt. of an organic solvent constituent, which is liquid at room temperature (20° C.)0.1-25% wt. of a detersive surfactant constituentoptionally a co-adhesion promoter constituent, preferably based on one or more oxyalkylenated compoundsfurther 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% wt. of water.Preferably the lavatory treatment compositions of the lavatory treatment devices are ringing gels.
