Except when I use hand dyed threads, I always wash my work, I mainly use the method you explained and use a few drops of dishwashing. I haven’t had any problem so far - but may be one day ?…. I don’t really do it for cleaning it - although that is what it does ! - but because I feel it has the same merits than blocking a knitted sweater. Your stitches appear more regular, the canvas lays down in a better way. That said, every one has its own way and it”s a good thing !
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