Stainless Strainer Adapter 1/4" Male NA0805-SS Base UOM:EACH and it is the cheapest

and it is the cheapest thing to rule out

Not sure whether Gum Gone or a citrus solvent suits your job

Actichem Instagloss 5 litre — the same product in the smaller pack

Measuring Range

Three ranges of sensitivity enabling the inspection of a variety of roof membranes and insulation thicknesses

Stainless Strainer Adapter 1/4" Male NA0805-SS Base UOM:EACH and it is the cheapestThis Stainless Strainer Adapter 1 4" Male will be used with the Mesh Stainer (NA0803) and the Strainer Body 1 4" S S (NA0802 SS) to make a Filter System suitable for most tools. This stainless steel strainer adapter features a 1 4" male connection, designed to integrate seamlessly with the Mesh Strainer (NA0803) and Strainer Body 1 4" S S (NA0802 SS). Together, these components form a complete filtration system compatible with most cleaning equipment.