The strings of the Tzitzit - And the same law applies to all objects used for a Mitzvah,like Sukkah, Lulav, Shofar, and all similar things after they have stopped they're use and the mitzvah no longer applies.

That became detached - Or if he [purposefully] removed them from the garment. And the same rule applies before he attached them to the garment. For just by virtue of the strings being ready/prepared [to attach to the garment, but not yet actually attached] is not considered [of importance].

To the garbage - But it is forbidden to use them in an unfitting/improper manner. For the Tzitzit are no less than the Tallit [whose laws are mentioned] below in 21:2.

Attached to the Tallit - Even if he is not currently wearing the Tallit and even if it's evening, since it's fitting to be worn and to fulfill with the Tzitzit the Mitzvah of wearing Tzitzit. And similarly a Shofar, even after Rosh Hashana, and similarly an old Lulav... if they are fitting to be used for the Mitzvah the following year, then it is forbidden to use them for other purposes because of "degrading the Mitzvah". And see [further] in Biur Halachah.

To use them for another purpose - And with Tzitzit, it would not suffice to make a condition saying "I am not separating myself from them [to allow them to be used for the mitzvah] like in [Shulchan Aruch] Siman 638, Se'if 2 (regarding Sukkah decorations), since it is a "degrading of the Mitzvah" of Tzitzit. For it is obvious that he is using the Tzitzit to fulfill the Mitzvah, for he makes the blessing over them "...to wrap".

One should not treat them - And similarly with the schach of the Sukkah and a Lulav and a Shofar... once they have stopped their use for the mitzvah, we do not throw them in the garbage or anything similar which would not be an honor to the mitzvah that has passed. And the Pri Megadim wrote that it is proper to not even use the walls of the Sukkah for an unfitting use.

To throw them - Meaning to say, with one's hands it's forbidden to throw them in the garbage. However, if by the fact that he did not put them in genizah (ie. a repository for sacred items) they got thrown away on their own... for that we are not concerned.

To place them in genizah (ie. a repository for sacred items) - The Maharil wrote that one can place the Tzitzit inside a [sacred] book as a bookmark or to use them for any other type of mitzvah... for since he it was used for one mitzvah, let it be used for another.

That wore out - See in Pri Megadim who wrote that [regarding] a garment used for the mitzvah [of Tzitzit] whose Tzitzit strings became detached, one should not make pants out of them... for that falls under the category of "unfitting use". And even from a Tallit Kattan it is forbidden.

And he is not permitted etc. - That is the proper text [Or Hachaim and so too is it implied from the Gra].

To wipe/clean etc. - Meaning to say, even to wipe the mud/dirt from his feet [So too is it proven from the Ran in chapter 13 in mesechet Shabbat]

Unfitting - But if it's not unfitting then it is permitted. [Regarding a Tallit whose] Tzitzit strings are still attached... if it's permitted to use the Tallit for a use that's not unfitting, the opinion of the Olat Tamid(?) is that it is allowed. For it's specifically the Tzitzit strings that the Mechaber (ie. the Shulchan Aruch) forbids in Se'if 1 (of chapter 21). But according to the Taz, it is forbidden. And so too the Pri Megadim agrees and wrote that a Tallit that's designated for prayer use, we are strict with it just like with the Tzitzit strings. But [regarding] a Tallit Kattan, it's obvious that it's allowed to be used for anything that's not unfitting... even when the Tzitzit strings are still attached. For it's a common clothing [item] and he is [even] allowed to sleep in them at night as will be mentioned soon.

He can throw them away - Meaning to say, in the garbage. And even [according to] the other opinions that were mentioned previously that forbid the Tzitzit strings themselves, it's inferred that they would agree here.

To the bathroom - And [this is] specifically with the Tallit Kattan that one wears throughout the day. But the Tallitot that are designated to be used for prayer services, it is not proper to enter with them into the bathroom. However, to urinate with them is permitted. Similarly, those who go on Yom Kippur to [the bathroom] to defecate and are wearing a Kittel, they need to remove the Kittel since that garment is designated to only be used for prayers.

To not sleep - And in the writings of the Arizal it is written based on the mystical teaching [Kabbalah] that one should sleep at night while wearing a Tallit Kattan.

To a non-Jewish cleaner to clean - ...the Tallit with the Tzitzit [attached], rather he should remove the Tzitzit strings and then afterwards they may be washed [by the non-Jew].

To sleep in them - And so too, to give them to a non-Jewish cleaner. However, there are those that are stringent regarding this and do it like was mentioned previously (ie. remove the strings first).

Shouldn't drag - Some explain [that] the reason is because of "degrading the Mitzvah". And additionally, because [doing so] makes them prone to becoming invalid (ie. the strings can tear etc.). Therefore, one should raise them and tuck them into their belt.