hello craig
wiltons are fine to clean so long as you are careful, if using hwe make sure you don not over wet the carpet, the backing on a wilton has cotton in it and if this gets wet then shrinkage can occur, increase your drying time by using air movers. Also be careful not to go to high a ph with your cleaning solution, the woll organisation reccomend no higher than 8 ph but 9-9.5 can be okay just check for colour fastness first.
hope this helps
best regards
mat