daz with conditioner for serv wash?

ive got a blind customer who uses tablets cos its easier than powder she has a whirlpool w/m and was complaning of it smelling i advised her to pop it on a boil wash with a tablet in to flush the machine out.
later i got a call saying the maching was leaking when i got there i couldnt find a fault with the machine so i repeated the cycle with one tablet in (daz with built in conditioner) and it over sudded the machine and came out of the soap drawer. she has changed back to persil tabs but dar`nt try a serv wash can anyone recomend someting easy for her to use ?

thanks paul